diff --git a/test/fuzztest/BUILD.gn b/test/fuzztest/BUILD.gn
index 1c4a33acaca84456e4ced6a5b2f1fded21826eaa..5b26911f68f9783c222c76aec8d343d10f3b099b 100644
--- a/test/fuzztest/BUILD.gn
+++ b/test/fuzztest/BUILD.gn
@@ -21,6 +21,7 @@ group("fuzztest") {
     "backupsaanother_fuzzer:BackupSaAnotherFuzzTest",
     "backupsaappend_fuzzer:BackupSaAppendFuzzTest",
     "backupservicestub_fuzzer:BackupServiceStubFuzzTest",
+    "backupservicestubbranch_fuzzer:BackupServiceStubBranchFuzzTest",
     "fileshare_fuzzer:FileShareFuzzTest",
     "remotefileshare_fuzzer:RemoteFileShareFuzzTest",
     "servicereverse_fuzzer:ServiceReverseFuzzTest",
diff --git a/test/fuzztest/backupservicestubbranch_fuzzer/BUILD.gn b/test/fuzztest/backupservicestubbranch_fuzzer/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..72b6e4f444dd0649ad83dbc4a78605f745d30789
--- /dev/null
+++ b/test/fuzztest/backupservicestubbranch_fuzzer/BUILD.gn
@@ -0,0 +1,64 @@
+# Copyright (c) 2021-2023 Huawei Device Co., Ltd.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+#####################hydra-fuzz###################
+import("//build/config/features.gni")
+import("//build/test.gni")
+import("//foundation/filemanagement/app_file_service/app_file_service.gni")
+import("//foundation/filemanagement/app_file_service/backup.gni")
+
+##############################fuzztest##########################################
+ohos_fuzztest("BackupServiceStubBranchFuzzTest") {
+  module_out_path = "app_file_service/app_file_service"
+  fuzz_config_file =
+      "${app_file_service_path}/test/fuzztest/backupservicestubbranch_fuzzer"
+  include_dirs = [
+    "${app_file_service_path}/frameworks/native/backup_kit_inner/include",
+    "${app_file_service_path}/interfaces/inner_api/native/backup_kit_inner/impl",
+    "${app_file_service_path}/services/backup_sa/include",
+    "${app_file_service_path}/services/backup_sa/include/module_ipc",
+    "${app_file_service_path}/utils/include",
+    "${app_file_service_path}/utils/include/b_hilog",
+  ]
+  cflags = [
+    "-g",
+    "-O0",
+    "-Wno-unused-variable",
+    "-fno-omit-frame-pointer",
+  ]
+  sources = [ "backupservicestubbranch_fuzzer.cpp" ]
+
+  deps = [
+    "${app_file_service_path}/interfaces/inner_api/native/backup_kit_inner:backup_kit_inner",
+    "${app_file_service_path}/services/backup_sa:backup_sa",
+    "${app_file_service_path}/utils:backup_utils",
+  ]
+
+  external_deps = [
+    "ability_runtime:ability_manager",
+    "ability_runtime:abilitykit_native",
+    "c_utils:utils",
+    "hilog:libhilog",
+    "ipc:ipc_core",
+    "safwk:system_ability_fwk",
+  ]
+
+  defines = [
+    "LOG_TAG=\"app_file_service\"",
+    "LOG_DOMAIN=0xD004303",
+    "private=public",
+  ]
+
+  use_exceptions = true
+}
+###############################################################################
diff --git a/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.cpp b/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4d2ba23426f3c59bd2f856b61fa6478a90a44e6d
--- /dev/null
+++ b/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.cpp
@@ -0,0 +1,1092 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "backupservicestubbranch_fuzzer.h"
+
+#include <cstring>
+#include <queue>
+
+#include "b_incremental_data.h"
+#include "b_session_backup.h"
+#include "b_session_restore.h"
+#include "message_parcel.h"
+#include "refbase.h"
+#include "service.h"
+#include "service_reverse.h"
+
+namespace OHOS {
+using namespace FileManagement::Backup;
+
+using FAFVariant = std::variant<bool, int32_t, int64_t, uint32_t, std::string, std::vector<std::string>>;
+
+list<FAFVariant> que;
+list<FAFVariant> arg;
+
+void ExpectReturn(list<FAFVariant>&& value)
+{
+    std::swap(que, value);
+}
+
+void ExpectArgReturn(list<FAFVariant>&& value)
+{
+    std::swap(arg, value);
+}
+
+bool GetBoolResult()
+{
+    bool ret = true;
+    if (!que.empty()) {
+        ret = std::get<bool>(que.front());
+        que.pop_front();
+    }
+    return ret;
+}
+
+Parcelable::Parcelable() : Parcelable(false)
+{}
+
+Parcelable::Parcelable(bool asRemote)
+{
+    asRemote_ = asRemote;
+    behavior_ = 0;
+}
+
+template <typename T>
+bool Parcel::Write(T value)
+{
+    size_t desireCapacity = sizeof(T);
+
+    if (EnsureWritableCapacity(desireCapacity)) {
+        *reinterpret_cast<T *>(data_ + writeCursor_) = value;
+        writeCursor_ += desireCapacity;
+        dataSize_ += desireCapacity;
+        return true;
+    }
+
+    return false;
+}
+
+bool Parcel::WriteParcelable(const Parcelable *object)
+{
+    if (object == nullptr) {
+        return WriteInt32(0);
+    }
+
+    if (!object->asRemote_) {
+        bool flag = WriteInt32(1);
+        object->Marshalling(*this);
+        return flag;
+    }
+
+    bool flag = WriteInt32(1);
+    WriteRemoteObject(const_cast<Parcelable*>(object));
+    return flag;
+}
+
+bool Parcel::WriteInt32(int32_t value)
+{
+    Write<int32_t>(value);
+    return GetBoolResult();
+}
+
+bool Parcel::WriteUint32(uint32_t value)
+{
+    Write<uint32_t>(value);
+    return GetBoolResult();
+}
+
+int32_t Parcel::ReadInt32()
+{
+    int32_t ret = 0;
+    if (!que.empty()) {
+        ret = std::get<int32_t>(que.front());
+        que.pop_front();
+    }
+    return ret;
+}
+
+bool Parcel::ReadInt32(int32_t &value)
+{
+    if (!arg.empty()) {
+        value = std::get<int32_t>(arg.front());
+        arg.pop_front();
+    }
+    return GetBoolResult();
+}
+
+bool Parcel::ReadBool()
+{
+    return GetBoolResult();
+}
+
+bool Parcel::ReadBool(bool &value)
+{
+    if (!arg.empty()) {
+        value = std::get<bool>(arg.front());
+        arg.pop_front();
+    }
+    return GetBoolResult();
+}
+
+bool Parcel::WriteBool(bool value)
+{
+    return GetBoolResult();
+}
+
+bool Parcel::WriteString(const std::string &value)
+{
+    return GetBoolResult();
+}
+
+bool Parcel::ReadString(std::string &value)
+{
+    if (!arg.empty()) {
+        value = std::get<string>(arg.front());
+        arg.pop_front();
+    }
+    return GetBoolResult();
+}
+
+bool Parcel::ReadStringVector(std::vector<std::string> *value)
+{
+    if (!arg.empty()) {
+        *value = std::get<std::vector<std::string>>(arg.front());
+        arg.pop_front();
+    }
+    return GetBoolResult();
+}
+
+bool MessageParcel::WriteFileDescriptor(int fd)
+{
+    return GetBoolResult();
+}
+
+int MessageParcel::ReadFileDescriptor()
+{
+    int32_t ret = 0;
+    if (!que.empty()) {
+        ret = std::get<int32_t>(que.front());
+        que.pop_front();
+    }
+    return ret;
+}
+
+bool Parcel::ReadUint32(uint32_t &value)
+{
+    if (!arg.empty()) {
+        value = std::get<uint32_t>(arg.front());
+        arg.pop_front();
+    }
+    return GetBoolResult();
+}
+
+constexpr int32_t SERVICE_ID = 5203;
+
+template<class T>
+T TypeCast(const uint8_t *data, int *pos = nullptr)
+{
+    if (pos) {
+        *pos += sizeof(T);
+    }
+    return *(reinterpret_cast<const T*>(data));
+}
+
+bool OnRemoteRequestFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(uint32_t)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+    MessageOption option;
+    uint32_t code = TypeCast<uint32_t>(data);
+
+    service->OnRemoteRequest(code, msg, reply, option);
+
+    msg.WriteInterfaceToken(ServiceStub::GetDescriptor());
+    service->OnRemoteRequest(code, msg, reply, option);
+    return true;
+}
+
+bool CmdInitRestoreSessionFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        service->CmdInitRestoreSession(msg, reply);
+
+        BSessionRestore::Callbacks callbacks;
+        msg.WriteRemoteObject(new ServiceReverse(callbacks));
+        ExpectReturn({false});
+        service->CmdInitRestoreSession(msg, reply);
+
+        msg.FlushBuffer();
+        msg.WriteRemoteObject(new ServiceReverse(callbacks));
+        ExpectReturn({true});
+        service->CmdInitRestoreSession(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdInitBackupSessionFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        service->CmdInitBackupSession(msg, reply);
+
+        BSessionBackup::Callbacks callbacks;
+        msg.WriteRemoteObject(new ServiceReverse(callbacks));
+        ExpectReturn({false});
+        service->CmdInitBackupSession(msg, reply);
+
+        msg.FlushBuffer();
+        msg.WriteRemoteObject(new ServiceReverse(callbacks));
+        ExpectReturn({true});
+        service->CmdInitBackupSession(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdStartFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        ExpectReturn({false});
+        service->CmdStart(msg, reply);
+
+        ExpectReturn({true});
+        service->CmdStart(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdGetLocalCapabilitiesFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        ExpectReturn({false});
+        service->CmdGetLocalCapabilities(msg, reply);
+
+        ExpectReturn({true});
+        service->CmdGetLocalCapabilities(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdPublishFileFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(TmpFileSN)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        BFileInfo info;
+        info.sn = TypeCast<TmpFileSN>(data, &pos);
+        int len = (size - pos) >> 1;
+        info.owner = string(reinterpret_cast<const char*>(data + pos), len);
+        info.fileName = string(reinterpret_cast<const char*>(data + pos + len), len);
+
+        msg.WriteParcelable(&info);
+        ExpectReturn({1, true, true, true, false});
+        ExpectArgReturn({info.owner, info.fileName, info.sn});
+        service->CmdPublishFile(msg, reply);
+
+        msg.FlushBuffer();
+        msg.WriteParcelable(&info);
+        ExpectReturn({1, true, true, true, true});
+        ExpectArgReturn({info.owner, info.fileName, info.sn});
+        service->CmdPublishFile(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppFileReadyFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int32_t) + sizeof(bool) + sizeof(int)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        int fd = TypeCast<int>(data, &pos);
+        int32_t errCode = TypeCast<int32_t>(data + pos, &pos);
+        bool flag = TypeCast<bool>(data + pos, &pos);
+        string fileName(reinterpret_cast<const char*>(data + pos), size - pos);
+
+        service->CmdAppFileReady(msg, reply);
+
+        ExpectReturn({false});
+        ExpectArgReturn({fileName});
+        service->CmdAppFileReady(msg, reply);
+
+        msg.FlushBuffer();
+        flag == true ? ExpectReturn({true, flag, fd, errCode, false}) : ExpectReturn({true, flag, errCode, false});
+        ExpectArgReturn({fileName});
+        service->CmdAppFileReady(msg, reply);
+
+        msg.FlushBuffer();
+        flag == true ? ExpectReturn({true, flag, fd, errCode, true}) : ExpectReturn({true, flag, errCode, true});
+        ExpectArgReturn({fileName});
+        service->CmdAppFileReady(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppDoneFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int32_t)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int32_t errCode = TypeCast<int32_t>(data);
+
+        ExpectReturn({false});
+        ExpectArgReturn({errCode});
+        service->CmdAppDone(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({errCode});
+        service->CmdAppDone(msg, reply);
+
+        ExpectReturn({true, true});
+        ExpectArgReturn({errCode});
+        service->CmdAppDone(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdResultReportFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int32_t) + sizeof(int32_t)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        int32_t scenario = TypeCast<int32_t>(data, &pos);
+        int32_t errCode = TypeCast<int32_t>(data + pos, &pos);
+        string restoreRetInfo(reinterpret_cast<const char*>(data + pos), size - pos);
+
+        ExpectReturn({false});
+        ExpectArgReturn({restoreRetInfo});
+        service->CmdResultReport(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({restoreRetInfo, scenario});
+        service->CmdResultReport(msg, reply);
+
+        ExpectReturn({true, true, false});
+        ExpectArgReturn({restoreRetInfo, scenario, errCode});
+        service->CmdResultReport(msg, reply);
+
+        ExpectReturn({true, true, true, false});
+        ExpectArgReturn({restoreRetInfo, scenario, errCode});
+        service->CmdResultReport(msg, reply);
+
+        ExpectReturn({true, true, true, true});
+        ExpectArgReturn({restoreRetInfo, scenario, errCode});
+        service->CmdResultReport(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdGetFileHandleFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int len = size >> 1;
+        string bundleName(reinterpret_cast<const char*>(data), len);
+        string fileName(reinterpret_cast<const char*>(data + len), size - len);
+
+        ExpectReturn({false});
+        ExpectArgReturn({bundleName});
+        service->CmdGetFileHandle(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({bundleName, fileName});
+        service->CmdGetFileHandle(msg, reply);
+
+        ExpectReturn({true, true});
+        ExpectArgReturn({bundleName, fileName});
+        service->CmdGetFileHandle(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppendBundlesRestoreSessionFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int) + sizeof(int32_t) + sizeof(int32_t)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        int fd = TypeCast<int>(data, &pos);
+        int32_t type = TypeCast<int32_t>(data + pos, &pos);
+        int32_t userId = TypeCast<int32_t>(data + pos, &pos);
+        vector<string> bundleNames;
+        bundleNames.emplace_back(string(reinterpret_cast<const char*>(data + pos), size - pos));
+
+        ExpectReturn({fd, false});
+        ExpectArgReturn({bundleNames});
+        service->CmdAppendBundlesRestoreSession(msg, reply);
+
+        ExpectReturn({fd, true, false});
+        ExpectArgReturn({bundleNames, type});
+        service->CmdAppendBundlesRestoreSession(msg, reply);
+
+        ExpectReturn({fd, true, true, false});
+        ExpectArgReturn({bundleNames, type, userId});
+        service->CmdAppendBundlesRestoreSession(msg, reply);
+
+        ExpectReturn({fd, true, true, true, false});
+        ExpectArgReturn({bundleNames, type, userId});
+        service->CmdAppendBundlesRestoreSession(msg, reply);
+
+        ExpectReturn({fd, true, true, true, true});
+        ExpectArgReturn({bundleNames, type, userId});
+        service->CmdAppendBundlesRestoreSession(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppendBundlesDetailsRestoreSessionFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int) + sizeof(int32_t) + sizeof(int32_t)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        int fd = TypeCast<int>(data, &pos);
+        int32_t type = TypeCast<int32_t>(data + pos, &pos);
+        int32_t userId = TypeCast<int32_t>(data + pos, &pos);
+        int len = (size - pos) >> 1;
+        vector<string> bundleNames;
+        bundleNames.emplace_back(string(reinterpret_cast<const char*>(data + pos), len));
+        vector<string> detailInfos;
+        detailInfos.emplace_back(string(reinterpret_cast<const char*>(data + pos + len), len));
+
+        ExpectReturn({fd, false});
+        ExpectArgReturn({bundleNames});
+        service->CmdAppendBundlesDetailsRestoreSession(msg, reply);
+
+        ExpectReturn({fd, true, false});
+        ExpectArgReturn({bundleNames, detailInfos});
+        service->CmdAppendBundlesDetailsRestoreSession(msg, reply);
+
+        ExpectReturn({fd, true, true, false});
+        ExpectArgReturn({bundleNames, detailInfos, type});
+        service->CmdAppendBundlesDetailsRestoreSession(msg, reply);
+
+        ExpectReturn({fd, true, true, true, false});
+        ExpectArgReturn({bundleNames, detailInfos, type, userId});
+        service->CmdAppendBundlesDetailsRestoreSession(msg, reply);
+
+        ExpectReturn({fd, true, true, true, true, false});
+        ExpectArgReturn({bundleNames, detailInfos, type, userId});
+        service->CmdAppendBundlesDetailsRestoreSession(msg, reply);
+
+        ExpectReturn({fd, true, true, true, true, true});
+        ExpectArgReturn({bundleNames, detailInfos, type, userId});
+        service->CmdAppendBundlesDetailsRestoreSession(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppendBundlesBackupSessionFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        vector<string> bundleNames;
+        bundleNames.emplace_back(string(reinterpret_cast<const char*>(data), size));
+
+        ExpectReturn({false});
+        ExpectArgReturn({bundleNames});
+        service->CmdAppendBundlesBackupSession(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({bundleNames});
+        service->CmdAppendBundlesBackupSession(msg, reply);
+
+        ExpectReturn({true, true});
+        ExpectArgReturn({bundleNames});
+        service->CmdAppendBundlesBackupSession(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppendBundlesDetailsBackupSessionFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int len = size >> 1;
+        vector<string> bundleNames;
+        bundleNames.emplace_back(string(reinterpret_cast<const char*>(data), len));
+        vector<string> detailInfos;
+        detailInfos.emplace_back(string(reinterpret_cast<const char*>(data + len), len));
+
+        ExpectReturn({false});
+        ExpectArgReturn({bundleNames});
+        service->CmdAppendBundlesDetailsBackupSession(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({bundleNames, detailInfos});
+        service->CmdAppendBundlesDetailsBackupSession(msg, reply);
+
+        ExpectReturn({true, true, false});
+        ExpectArgReturn({bundleNames, detailInfos});
+        service->CmdAppendBundlesDetailsBackupSession(msg, reply);
+
+        ExpectReturn({true, true, true});
+        ExpectArgReturn({bundleNames, detailInfos});
+        service->CmdAppendBundlesDetailsBackupSession(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdFinishFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+    try {
+        ExpectReturn({false});
+        service->CmdFinish(msg, reply);
+
+        ExpectReturn({true});
+        service->CmdFinish(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+[[maybe_unused]] bool CmdReleaseFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+    try {
+        service->CmdRelease(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdGetLocalCapabilitiesIncrementalFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        BIncrementalData bundleNames(string(reinterpret_cast<const char*>(data), size), 0);
+
+        int32_t infoSize = 1;
+        ExpectReturn({false});
+        ExpectArgReturn({infoSize});
+        service->CmdGetLocalCapabilitiesIncremental(msg, reply);
+
+        ExpectReturn({true, true, true, true, true, true, 1, true, true, true, 0, true, false});
+        ExpectArgReturn({infoSize, "", "", 1});
+        msg.FlushBuffer();
+        msg.WriteParcelable(&bundleNames);
+        service->CmdGetLocalCapabilitiesIncremental(msg, reply);
+
+        ExpectReturn({true, true, true, true, true, true, 1, true, true, true, 0, true, true});
+        ExpectArgReturn({infoSize, "", "", 1});
+        msg.FlushBuffer();
+        msg.WriteParcelable(&bundleNames);
+        service->CmdGetLocalCapabilitiesIncremental(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdGetAppLocalListAndDoIncrementalBackupFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+    try {
+        ExpectReturn({false});
+        service->CmdGetAppLocalListAndDoIncrementalBackup(msg, reply);
+
+        ExpectReturn({true});
+        service->CmdGetAppLocalListAndDoIncrementalBackup(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdInitIncrementalBackupSessionFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        service->CmdInitIncrementalBackupSession(msg, reply);
+
+        BIncrementalBackupSession::Callbacks callbacks;
+        msg.WriteRemoteObject(new ServiceReverse(callbacks));
+        ExpectReturn({false});
+        service->CmdInitIncrementalBackupSession(msg, reply);
+
+        msg.FlushBuffer();
+        msg.WriteRemoteObject(new ServiceReverse(callbacks));
+        ExpectReturn({true});
+        service->CmdInitIncrementalBackupSession(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppendBundlesIncrementalBackupSessionFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        BIncrementalData bundlesToBackup(string(reinterpret_cast<const char*>(data), size), 0);
+
+        ExpectReturn({false});
+        service->CmdAppendBundlesIncrementalBackupSession(msg, reply);
+
+        int32_t infoSize = 1;
+        ExpectReturn({true, true, true, true, true, true, 1, true, true, true, 0, false});
+        ExpectArgReturn({infoSize, "", "", 1});
+        msg.FlushBuffer();
+        msg.WriteParcelable(&bundlesToBackup);
+        service->CmdAppendBundlesIncrementalBackupSession(msg, reply);
+
+        ExpectReturn({true, true, true, true, true, true, 1, true, true, true, 0, true});
+        ExpectArgReturn({infoSize, "", "", 1});
+        msg.FlushBuffer();
+        msg.WriteParcelable(&bundlesToBackup);
+        service->CmdAppendBundlesIncrementalBackupSession(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppendBundlesDetailsIncrementalBackupSessionFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int32_t infoSize = 1;
+        int len = size >> 1;
+        BIncrementalData bundlesToBackup(string(reinterpret_cast<const char*>(data), len), 0);
+        std::vector<std::string> infos;
+        infos.emplace_back(string(reinterpret_cast<const char*>(data + len), len));
+
+        ExpectReturn({false});
+        ExpectArgReturn({infoSize});
+        service->CmdAppendBundlesDetailsIncrementalBackupSession(msg, reply);
+
+        ExpectReturn({true, true, true, true, true, true, 1, true, true, true, 0, false});
+        ExpectArgReturn({infoSize, "", "", 1, infos});
+        msg.FlushBuffer();
+        msg.WriteParcelable(&bundlesToBackup);
+        service->CmdAppendBundlesDetailsIncrementalBackupSession(msg, reply);
+
+        ExpectReturn({true, true, true, true, true, true, 1, true, true, true, 0, true, false});
+        ExpectArgReturn({infoSize, "", "", 1, infos});
+        msg.FlushBuffer();
+        msg.WriteParcelable(&bundlesToBackup);
+        service->CmdAppendBundlesDetailsIncrementalBackupSession(msg, reply);
+
+        ExpectReturn({true, true, true, true, true, true, 1, true, true, true, 0, true, true});
+        ExpectArgReturn({infoSize, "", "", 1, infos});
+        msg.FlushBuffer();
+        msg.WriteParcelable(&bundlesToBackup);
+        service->CmdAppendBundlesDetailsIncrementalBackupSession(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdPublishIncrementalFileFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(TmpFileSN)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        BFileInfo info;
+        info.sn = TypeCast<TmpFileSN>(data, &pos);
+        int len = (size - pos) >> 1;
+        info.owner = string(reinterpret_cast<const char*>(data + pos), len);
+        info.fileName = string(reinterpret_cast<const char*>(data + pos + len), len);
+
+        msg.WriteParcelable(&info);
+        ExpectReturn({1, true, true, true, false});
+        ExpectArgReturn({info.owner, info.fileName, info.sn});
+        service->CmdPublishIncrementalFile(msg, reply);
+
+        msg.FlushBuffer();
+        msg.WriteParcelable(&info);
+        ExpectReturn({1, true, true, true, true});
+        ExpectArgReturn({info.owner, info.fileName, info.sn});
+        service->CmdPublishIncrementalFile(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+[[maybe_unused]] bool CmdPublishSAIncrementalFileFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int) + sizeof(TmpFileSN)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        BFileInfo info;
+        int fd = TypeCast<int>(data, &pos);
+        info.sn = TypeCast<TmpFileSN>(data, &pos);
+        int len = (size - pos) >> 1;
+        info.owner = string(reinterpret_cast<const char*>(data + pos), len);
+        info.fileName = string(reinterpret_cast<const char*>(data + pos + len), len);
+
+        msg.WriteParcelable(&info);
+        ExpectReturn({fd, false});
+        service->CmdPublishSAIncrementalFile(msg, reply);
+
+        msg.FlushBuffer();
+        msg.WriteParcelable(&info);
+        ExpectReturn({fd, true});
+        service->CmdPublishSAIncrementalFile(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppIncrementalFileReadyFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int32_t) + sizeof(bool) + sizeof(int) + sizeof(int)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        int fd1 = TypeCast<int>(data, &pos);
+        int fd2 = TypeCast<int>(data + pos, &pos);
+        int32_t errCode = TypeCast<int32_t>(data + pos, &pos);
+        bool flag = TypeCast<bool>(data + pos, &pos);
+        string fileName(reinterpret_cast<const char*>(data + pos), size - pos);
+
+        ExpectReturn({false});
+        ExpectArgReturn({fileName});
+        service->CmdAppIncrementalFileReady(msg, reply);
+
+        if (flag) {
+            fd1 < 0 ? ExpectReturn({true, flag, fd1, errCode, false}) :
+                ExpectReturn({true, flag, fd1, fd2, errCode, false});
+        } else {
+            ExpectReturn({true, flag, errCode, false});
+        }
+        ExpectArgReturn({fileName});
+        service->CmdAppIncrementalFileReady(msg, reply);
+
+        if (flag) {
+            fd1 < 0 ? ExpectReturn({true, flag, fd1, errCode, true}) :
+            ExpectReturn({true, flag, fd1, fd2, errCode, true});
+        } else {
+            ExpectReturn({true, flag, errCode, true});
+        }
+        ExpectArgReturn({fileName});
+        service->CmdAppIncrementalFileReady(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdAppIncrementalDoneFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int32_t)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int32_t errCode = TypeCast<int32_t>(data);
+
+        ExpectReturn({false});
+        ExpectArgReturn({errCode});
+        service->CmdAppIncrementalDone(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({errCode});
+        service->CmdAppIncrementalDone(msg, reply);
+
+        ExpectReturn({true, true});
+        ExpectArgReturn({errCode});
+        service->CmdAppIncrementalDone(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdGetIncrementalFileHandleFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int len = size >> 1;
+        string bundleName(reinterpret_cast<const char*>(data), len);
+        string fileName(reinterpret_cast<const char*>(data + len), size - len);
+
+        ExpectReturn({false});
+        ExpectArgReturn({bundleName});
+        service->CmdGetIncrementalFileHandle(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({bundleName, fileName});
+        service->CmdGetIncrementalFileHandle(msg, reply);
+
+        ExpectReturn({true, true});
+        ExpectArgReturn({bundleName, fileName});
+        service->CmdGetIncrementalFileHandle(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdGetBackupInfoFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int32_t)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        int32_t scenario = TypeCast<int32_t>(data, &pos);
+        string processInfo(reinterpret_cast<const char*>(data + pos), size - pos);
+
+        ExpectReturn({false});
+        ExpectArgReturn({processInfo});
+        service->CmdGetBackupInfo(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({processInfo, scenario});
+        service->CmdGetBackupInfo(msg, reply);
+
+        ExpectReturn({true, true});
+        ExpectArgReturn({processInfo, scenario});
+        service->CmdGetBackupInfo(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdUpdateTimerFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int32_t)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        uint32_t timeout = TypeCast<uint32_t>(data, &pos);
+        string bundleName(reinterpret_cast<const char*>(data + pos), size - pos);
+
+        ExpectReturn({false});
+        ExpectArgReturn({bundleName});
+        service->CmdUpdateTimer(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({bundleName, timeout});
+        service->CmdUpdateTimer(msg, reply);
+
+        ExpectReturn({true, true, false});
+        ExpectArgReturn({bundleName, timeout});
+        service->CmdUpdateTimer(msg, reply);
+
+        ExpectReturn({true, true, true});
+        ExpectArgReturn({bundleName, timeout});
+        service->CmdUpdateTimer(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+
+bool CmdUpdateSendRateFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
+{
+    if (data == nullptr || size < sizeof(int32_t)) {
+        return true;
+    }
+
+    MessageParcel msg;
+    MessageParcel reply;
+
+    try {
+        int pos = 0;
+        int32_t sendRate = TypeCast<int32_t>(data, &pos);
+        string bundleName(reinterpret_cast<const char*>(data + pos), size - pos);
+
+        ExpectReturn({false});
+        ExpectArgReturn({bundleName});
+        service->CmdUpdateSendRate(msg, reply);
+
+        ExpectReturn({true, false});
+        ExpectArgReturn({bundleName, sendRate});
+        service->CmdUpdateSendRate(msg, reply);
+
+        ExpectReturn({true, true, false});
+        ExpectArgReturn({bundleName, sendRate});
+        service->CmdUpdateSendRate(msg, reply);
+
+        ExpectReturn({true, true, true});
+        ExpectArgReturn({bundleName, sendRate});
+        service->CmdUpdateSendRate(msg, reply);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return true;
+}
+} // namespace OHOS
+
+/* Fuzzer entry point */
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    OHOS::sptr service(new OHOS::FileManagement::Backup::Service(OHOS::SERVICE_ID));
+    if (service == nullptr) {
+        return 0;
+    }
+
+    try {
+        OHOS::OnRemoteRequestFuzzTest(service, data, size);
+        CmdInitRestoreSessionFuzzTest(service, data, size);
+        CmdInitBackupSessionFuzzTest(service, data, size);
+        CmdStartFuzzTest(service, data, size);
+        CmdGetLocalCapabilitiesFuzzTest(service, data, size);
+        CmdPublishFileFuzzTest(service, data, size);
+        CmdAppFileReadyFuzzTest(service, data, size);
+        CmdAppDoneFuzzTest(service, data, size);
+        CmdResultReportFuzzTest(service, data, size);
+        CmdGetFileHandleFuzzTest(service, data, size);
+        CmdAppendBundlesRestoreSessionFuzzTest(service, data, size);
+        CmdAppendBundlesDetailsRestoreSessionFuzzTest(service, data, size);
+        CmdAppendBundlesBackupSessionFuzzTest(service, data, size);
+        CmdAppendBundlesDetailsBackupSessionFuzzTest(service, data, size);
+        CmdFinishFuzzTest(service, data, size);
+        CmdGetLocalCapabilitiesIncrementalFuzzTest(service, data, size);
+        CmdGetAppLocalListAndDoIncrementalBackupFuzzTest(service, data, size);
+        CmdInitIncrementalBackupSessionFuzzTest(service, data, size);
+        CmdAppendBundlesIncrementalBackupSessionFuzzTest(service, data, size);
+        CmdAppendBundlesDetailsIncrementalBackupSessionFuzzTest(service, data, size);
+        CmdPublishIncrementalFileFuzzTest(service, data, size);
+        CmdAppIncrementalFileReadyFuzzTest(service, data, size);
+        CmdAppIncrementalDoneFuzzTest(service, data, size);
+        CmdGetIncrementalFileHandleFuzzTest(service, data, size);
+        CmdGetBackupInfoFuzzTest(service, data, size);
+        CmdUpdateTimerFuzzTest(service, data, size);
+        CmdUpdateSendRateFuzzTest(service, data, size);
+    } catch (OHOS::FileManagement::Backup::BError &err) {
+        // Only filter BError errors, Other results are not expected.
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.h b/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.h
new file mode 100644
index 0000000000000000000000000000000000000000..e1a5fcc77b001f68fef2c5fedf2ed6c11656672c
--- /dev/null
+++ b/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef BACKUP_SERVICE_STUB_FUZZER_H
+#define BACKUP_SERVICE_STUB_FUZZER_H
+
+#define FUZZ_PROJECT_NAME "backupservicestubbranch_fuzzer"
+
+#endif
\ No newline at end of file
diff --git a/test/fuzztest/backupservicestubbranch_fuzzer/corpus/init b/test/fuzztest/backupservicestubbranch_fuzzer/corpus/init
new file mode 100644
index 0000000000000000000000000000000000000000..6198079a28e860189d4294f6598f8ac6804c0dff
--- /dev/null
+++ b/test/fuzztest/backupservicestubbranch_fuzzer/corpus/init
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+FUZZ
\ No newline at end of file
diff --git a/test/fuzztest/backupservicestubbranch_fuzzer/project.xml b/test/fuzztest/backupservicestubbranch_fuzzer/project.xml
new file mode 100644
index 0000000000000000000000000000000000000000..7133b2b92440904a5ed04b838733acea0f97486a
--- /dev/null
+++ b/test/fuzztest/backupservicestubbranch_fuzzer/project.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2024 Huawei Device Co., Ltd.
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<fuzz_config>
+  <fuzztest>
+    <!-- maximum length of a test input -->
+    <max_len>1000</max_len>
+    <!-- maximum total time in seconds to run the fuzzer -->
+    <max_total_time>300</max_total_time>
+    <!-- memory usage limit in Mb -->
+    <rss_limit_mb>4096</rss_limit_mb>
+  </fuzztest>
+</fuzz_config>