diff --git a/test/fuzztest/BUILD.gn b/test/fuzztest/BUILD.gn
index 12a10c0b2c6688fc270132b544a0cfc7be9cad0d..991b0ae6b4ddde95e0ae503b1f8fe60dd4a1a44e 100644
--- a/test/fuzztest/BUILD.gn
+++ b/test/fuzztest/BUILD.gn
@@ -18,6 +18,7 @@ group("fuzztest") {
     # deps file
     "backupext_fuzzer:BackupExtFuzzTest",
     "backupsa_fuzzer:BackupSaFuzzTest",
+    "backupsaappend_fuzzer:BackupSaAppendFuzzTest",
     "fileshare_fuzzer:FileShareFuzzTest",
     "remotefileshare_fuzzer:RemoteFileShareFuzzTest",
     "servicereverse_fuzzer:ServiceReverseFuzzTest",
diff --git a/test/fuzztest/backupsaappend_fuzzer/BUILD.gn b/test/fuzztest/backupsaappend_fuzzer/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..c7ae508b0505f487c2e21c3a4dce750b519cdd13
--- /dev/null
+++ b/test/fuzztest/backupsaappend_fuzzer/BUILD.gn
@@ -0,0 +1,59 @@
+# Copyright (c) 2021-2024 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.
+
+#####################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("BackupSaAppendFuzzTest") {
+  module_out_path = "app_file_service/app_file_service"
+  fuzz_config_file =
+      "${app_file_service_path}/test/fuzztest/backupsaappend_fuzzer"
+  include_dirs = [
+    "${app_file_service_path}/services/backup_sa/include/module_ipc",
+    "${app_file_service_path}/services/backup_sa/include",
+    "${app_file_service_path}/interfaces/inner_api/native/backup_kit_inner/impl",
+  ]
+  cflags = [
+    "-g",
+    "-O0",
+    "-Wno-unused-variable",
+    "-fno-omit-frame-pointer",
+  ]
+  sources = [ "backupsaappend_fuzzer.cpp" ]
+
+  deps = [
+    "${app_file_service_path}/services/backup_sa:backup_sa",
+    "${path_backup}/utils:backup_utils",
+    "${third_party_path}/bounds_checking_function:libsec_shared",
+  ]
+
+  external_deps = [
+    "ability_runtime:ability_manager",
+    "ability_runtime:abilitykit_native",
+    "c_utils:utils",
+    "file_api:filemgmt_libn",
+    "hilog:libhilog",
+    "ipc:ipc_core",
+    "safwk:system_ability_fwk",
+  ]
+
+  defines = [
+    "LOG_TAG=\"app_file_service\"",
+    "LOG_DOMAIN=0xD200000",
+  ]
+}
+###############################################################################
diff --git a/test/fuzztest/backupsaappend_fuzzer/backupsaappend_fuzzer.cpp b/test/fuzztest/backupsaappend_fuzzer/backupsaappend_fuzzer.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b741dc24cafa34a72da845c85ed2a751b8deb09c
--- /dev/null
+++ b/test/fuzztest/backupsaappend_fuzzer/backupsaappend_fuzzer.cpp
@@ -0,0 +1,95 @@
+/*
+ * 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 "backupsaappend_fuzzer.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
+
+#include <climits>
+#include "message_parcel.h"
+#include "service_stub.h"
+#include "service.h"
+#include "securec.h"
+#include "system_ability.h"
+
+using namespace OHOS::FileManagement::Backup;
+
+namespace OHOS {
+constexpr int32_t SERVICE_ID = 5203;
+
+bool CmdStartFuzzTest(const uint8_t *data, size_t size)
+{
+    MessageParcel datas;
+    datas.WriteInterfaceToken(ServiceStub::GetDescriptor());
+    datas.WriteBuffer(data, size);
+    datas.RewindRead(0);
+    MessageParcel reply;
+    MessageOption option;
+
+    sptr service = sptr(new Service(SERVICE_ID));
+    service->OnRemoteRequest(static_cast<uint32_t>(IServiceInterfaceCode::SERVICE_CMD_START),
+        datas, reply, option);
+    service = nullptr;
+    return true;
+}
+
+bool CmdFinishFuzzTest(const uint8_t *data, size_t size)
+{
+    MessageParcel datas;
+    datas.WriteInterfaceToken(ServiceStub::GetDescriptor());
+    datas.WriteBuffer(data, size);
+    datas.RewindRead(0);
+    MessageParcel reply;
+    MessageOption option;
+
+    sptr service = sptr(new Service(SERVICE_ID));
+    service->OnRemoteRequest(static_cast<uint32_t>(IServiceInterfaceCode::SERVICE_CMD_FINISH),
+        datas, reply, option);
+    service = nullptr;
+    return true;
+}
+
+bool CmdAppendBundlesRestoreSessionFuzzTest(const uint8_t *data, size_t size)
+{
+    MessageParcel datas;
+    datas.WriteInterfaceToken(ServiceStub::GetDescriptor());
+    datas.WriteBuffer(data, size);
+    datas.RewindRead(0);
+    MessageParcel reply;
+    MessageOption option;
+
+    sptr service = sptr(new Service(SERVICE_ID));
+    service->OnRemoteRequest(static_cast<uint32_t>(IServiceInterfaceCode::SERVICE_CMD_APPEND_BUNDLES_RESTORE_SESSION),
+        datas, reply, option);
+    service = nullptr;
+    return true;
+}
+} // namespace OHOS
+
+/* Fuzzer entry point */
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    /* Run your code on data */
+    if (data == nullptr) {
+        return 0;
+    }
+
+    OHOS::CmdStartFuzzTest(data, size);
+    OHOS::CmdFinishFuzzTest(data, size);
+    OHOS::CmdAppendBundlesRestoreSessionFuzzTest(data, size);
+    return 0;
+}
\ No newline at end of file
diff --git a/test/fuzztest/backupsaappend_fuzzer/backupsaappend_fuzzer.h b/test/fuzztest/backupsaappend_fuzzer/backupsaappend_fuzzer.h
new file mode 100644
index 0000000000000000000000000000000000000000..8ddfc2126b559d055ee576338bf4e3ca548e75f9
--- /dev/null
+++ b/test/fuzztest/backupsaappend_fuzzer/backupsaappend_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 BACKUPSAAPPEND_FUZZER_H
+#define BACKUPSAAPPEND_FUZZER_H
+
+#define FUZZ_PROJECT_NAME "backupsaappend_fuzzer"
+
+#endif
\ No newline at end of file
diff --git a/test/fuzztest/backupsaappend_fuzzer/corpus/init b/test/fuzztest/backupsaappend_fuzzer/corpus/init
new file mode 100644
index 0000000000000000000000000000000000000000..6198079a28e860189d4294f6598f8ac6804c0dff
--- /dev/null
+++ b/test/fuzztest/backupsaappend_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/backupsaappend_fuzzer/project.xml b/test/fuzztest/backupsaappend_fuzzer/project.xml
new file mode 100644
index 0000000000000000000000000000000000000000..7133b2b92440904a5ed04b838733acea0f97486a
--- /dev/null
+++ b/test/fuzztest/backupsaappend_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>
diff --git a/test/fuzztest/servicereverse_fuzzer/servicereverse_fuzzer.cpp b/test/fuzztest/servicereverse_fuzzer/servicereverse_fuzzer.cpp
index ed6db23232406775cf08d5063a5ea222c2533515..5ad5da0877699e51d0b6ec32f05f8c0dad85f166 100644
--- a/test/fuzztest/servicereverse_fuzzer/servicereverse_fuzzer.cpp
+++ b/test/fuzztest/servicereverse_fuzzer/servicereverse_fuzzer.cpp
@@ -155,11 +155,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
         return 0;
     }
 
-    auto str = std::make_unique<char[]>(size + 1);
-    (void)memset_s(str.get(), size + 1, 0x00, size + 1);
-    if (memcpy_s(str.get(), size, data, size) != EOK) {
-        return 0;
-    }
     OHOS::BackupFuzzTest(data, size);
     OHOS::RestoreFuzzTest(data, size);
     OHOS::IncrementalBackupFuzzTest(data, size);