diff --git a/frameworks/native/child_process/include/native_child_callback.h b/frameworks/native/child_process/include/native_child_callback.h
index 128ef026e504fe182fefc6121ab626abb5fc4a27..c13e68d8d0205190658b4919bd20733fec83359e 100644
--- a/frameworks/native/child_process/include/native_child_callback.h
+++ b/frameworks/native/child_process/include/native_child_callback.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Copyright (c) 2024-2025 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
@@ -29,9 +29,9 @@ public:
     explicit NativeChildCallback(OH_Ability_OnNativeChildProcessStarted cb);
     ~NativeChildCallback() = default;
 
-    void OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild) override;
-    void OnError(int32_t errCode) override;
-    int32_t OnNativeChildExit(int32_t pid, int32_t signal) override;
+    ErrCode OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild) override;
+    ErrCode OnError(int32_t errCode) override;
+    ErrCode OnNativeChildExit(int32_t pid, int32_t signal) override;
 
     bool IsCallbacksEmpty();
     void AddExitCallback(OH_Ability_OnNativeChildProcessExit callback);
diff --git a/frameworks/native/child_process/src/native_child_callback.cpp b/frameworks/native/child_process/src/native_child_callback.cpp
index 86e451643422f67d45353c6f571e3d5dc2d6d5fc..95a743ba6be1adde7ebeb3837752567ef67c98dc 100644
--- a/frameworks/native/child_process/src/native_child_callback.cpp
+++ b/frameworks/native/child_process/src/native_child_callback.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Copyright (c) 2024-2025 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
@@ -26,16 +26,16 @@ NativeChildCallback::NativeChildCallback(OH_Ability_OnNativeChildProcessStarted
 {
 }
 
-void NativeChildCallback::OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild)
+ErrCode NativeChildCallback::OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild)
 {
     if (callback_ == nullptr) {
         TAG_LOGE(AAFwkTag::PROCESSMGR, "null callback_");
-        return;
+        return ERR_INVALID_VALUE;
     }
 
     if (!nativeChild) {
         TAG_LOGE(AAFwkTag::PROCESSMGR, "null nativeChild");
-        return;
+        return ERR_INVALID_VALUE;
     }
     
     TAG_LOGI(AAFwkTag::PROCESSMGR, "Native child process started");
@@ -44,20 +44,21 @@ void NativeChildCallback::OnNativeChildStarted(const sptr<IRemoteObject> &native
     if (ipcProxy == nullptr) {
         TAG_LOGE(AAFwkTag::PROCESSMGR, "null ipcProxy");
         callback_(NCP_ERR_INTERNAL, nullptr);
-        return;
+        return ERR_INVALID_VALUE;
     }
 
     callback_(static_cast<int32_t>(ChildProcessManagerErrorCode::ERR_OK), ipcProxy);
     callback_ = nullptr;
 
     ChildCallbackManager::GetInstance().RemoveRemoteObject(this);
+    return ERR_OK;
 }
 
-void NativeChildCallback::OnError(int32_t errCode)
+ErrCode NativeChildCallback::OnError(int32_t errCode)
 {
     if (callback_ == nullptr) {
         TAG_LOGE(AAFwkTag::PROCESSMGR, "null callback_");
-        return;
+        return ERR_INVALID_VALUE;
     }
 
     TAG_LOGI(AAFwkTag::PROCESSMGR, "Native child process start err %{public}d", errCode);
@@ -65,9 +66,10 @@ void NativeChildCallback::OnError(int32_t errCode)
     
     callback_ = nullptr;
     ChildCallbackManager::GetInstance().RemoveRemoteObject(this);
+    return ERR_OK;
 }
 
-int32_t NativeChildCallback::OnNativeChildExit(int32_t pid, int32_t signal)
+ErrCode NativeChildCallback::OnNativeChildExit(int32_t pid, int32_t signal)
 {
     auto exitCallbacks = GetExitCallbacks();
     for (const auto &exitCallback : exitCallbacks) {
diff --git a/interfaces/inner_api/app_manager/BUILD.gn b/interfaces/inner_api/app_manager/BUILD.gn
index 59318b86d696ecc230586dab81c63f9db0e2327e..25215c2930dfd893e749d599777da0a989246fc3 100644
--- a/interfaces/inner_api/app_manager/BUILD.gn
+++ b/interfaces/inner_api/app_manager/BUILD.gn
@@ -45,6 +45,7 @@ idl_gen_interface("appmgr_innerkits") {
   sources = [
     "idl/IAbilityDebugResponse.idl",
     "idl/IAppDebugListener.idl",
+    "idl/INativeChildNotify.idl",
     "idl/IStartSpecifiedAbilityResponse.idl",
   ]
   log_domainid = "0xD001311"
@@ -206,8 +207,6 @@ ohos_shared_library("app_manager") {
     "src/appmgr/kia_interceptor_stub.cpp",
     "src/appmgr/killed_process_info.cpp",
     "src/appmgr/memory_level_info.cpp",
-    "src/appmgr/native_child_notify_proxy.cpp",
-    "src/appmgr/native_child_notify_stub.cpp",
     "src/appmgr/page_state_data.cpp",
     "src/appmgr/priority_object.cpp",
     "src/appmgr/process_data.cpp",
diff --git a/interfaces/inner_api/app_manager/include/appmgr/native_child_notify_stub.h b/interfaces/inner_api/app_manager/idl/INativeChildNotify.idl
similarity index 38%
rename from interfaces/inner_api/app_manager/include/appmgr/native_child_notify_stub.h
rename to interfaces/inner_api/app_manager/idl/INativeChildNotify.idl
index e81ad08281f066a910bf1bc832f0ffa896bcc370..496990474684d54a8a27c2edd25527e2b718f109 100644
--- a/interfaces/inner_api/app_manager/include/appmgr/native_child_notify_stub.h
+++ b/interfaces/inner_api/app_manager/idl/INativeChildNotify.idl
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Copyright (c) 2025 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
@@ -13,30 +13,10 @@
  * limitations under the License.
  */
 
-#ifndef OHOS_ABILITY_RUNTIME_NATIVE_CHILD_NOTIFY_STUB_H
-#define OHOS_ABILITY_RUNTIME_NATIVE_CHILD_NOTIFY_STUB_H
+sequenceable OHOS.IRemoteObject;
 
-#include "native_child_notify_interface.h"
-#include "iremote_stub.h"
-
-namespace OHOS {
-namespace AppExecFwk {
-
-class NativeChildNotifyStub : public IRemoteStub<INativeChildNotify> {
-public:
-    NativeChildNotifyStub() = default;
-    virtual ~NativeChildNotifyStub() = default;
-
-    int OnRemoteRequest(
-        uint32_t code, MessageParcel &data, MessageParcel &reply, MessageOption &option) override;
-
-private:
-    int32_t HandleOnNativeChildStarted(MessageParcel &data, MessageParcel &reply);
-    int32_t HandleOnError(MessageParcel &data, MessageParcel &reply);
-    int32_t HandleOnNativeChildExit(MessageParcel &data, MessageParcel &reply);
-};
-
-} // OHOS
-} // AppExecFwk
-
-#endif // OHOS_ABILITY_RUNTIME_NATIVE_CHILD_NOTIFY_STUB_H
\ No newline at end of file
+interface OHOS.AppExecFwk.INativeChildNotify {
+    [oneway] void OnNativeChildStarted([in] IRemoteObject nativeChild);
+    [oneway] void OnError([in] int errorCode);
+    [oneway] void OnNativeChildExit([in] int pid, [in] int signal);
+};
\ No newline at end of file
diff --git a/interfaces/inner_api/app_manager/include/appmgr/app_mgr_interface.h b/interfaces/inner_api/app_manager/include/appmgr/app_mgr_interface.h
index f0d1dbfabbf912a084e45c7843e572d219179b4a..578504cc9d6d0493c85c353c5d5475a529eab716 100644
--- a/interfaces/inner_api/app_manager/include/appmgr/app_mgr_interface.h
+++ b/interfaces/inner_api/app_manager/include/appmgr/app_mgr_interface.h
@@ -36,6 +36,7 @@
 #include "iapp_state_callback.h"
 #include "iapplication_state_observer.h"
 #include "iconfiguration_observer.h"
+#include "inative_child_notify.h"
 #include "iquick_fix_callback.h"
 #include "iremote_broker.h"
 #include "iremote_object.h"
@@ -51,7 +52,6 @@
 #include "app_jsheap_mem_info.h"
 #include "app_cjheap_mem_info.h"
 #include "running_multi_info.h"
-#include "native_child_notify_interface.h"
 
 namespace OHOS {
 namespace AppExecFwk {
diff --git a/interfaces/inner_api/app_manager/include/appmgr/native_child_notify_interface.h b/interfaces/inner_api/app_manager/include/appmgr/native_child_notify_interface.h
deleted file mode 100644
index 3eba849f17f2c7eace96039793fa91017db33727..0000000000000000000000000000000000000000
--- a/interfaces/inner_api/app_manager/include/appmgr/native_child_notify_interface.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * 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 OHOS_ABILITY_RUNTIME_NATIVE_CHILD_NOTIFY_INTERFACE_H
-#define OHOS_ABILITY_RUNTIME_NATIVE_CHILD_NOTIFY_INTERFACE_H
-
-#include "iremote_broker.h"
-
-namespace OHOS {
-namespace AppExecFwk {
-
-class INativeChildNotify : public IRemoteBroker {
-public:
-    DECLARE_INTERFACE_DESCRIPTOR(u"ohos.appexecfwk.NativeChildNotify");
-
-    /**
-     * Notify native child process started.
-     *
-     * @param nativeChild child process ipc object
-     */
-    virtual void OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild) = 0;
-
-    /**
-     * Notify native child process start failed.
-     *
-     * @param errCode failed error code
-     */
-    virtual void OnError(int32_t errCode) = 0;
-
-    /**
-     * Notify native child process exit.
-     *
-     * @param pid child process pid
-     * @param signal child process exit signal
-     * @return Returns ERR_OK on success, others on failure.
-     */
-    virtual int32_t OnNativeChildExit(int32_t pid, int32_t signal) = 0;
-
-    enum {
-        // ipc id for OnNativeChildStarted
-        IPC_ID_ON_NATIVE_CHILD_STARTED = 0,
-
-        // ipc id for OnError
-        IPC_ID_ON_ERROR = 1,
-
-        IPC_ID_ON_NATIVE_CHILD_EXIT = 2
-    };
-};
-
-} // OHOS
-} // AppExecFwk
-
-#endif // OHOS_ABILITY_RUNTIME_NATIVE_CHILD_NOTIFY_INTERFACE_H
\ No newline at end of file
diff --git a/interfaces/inner_api/app_manager/include/appmgr/native_child_notify_proxy.h b/interfaces/inner_api/app_manager/include/appmgr/native_child_notify_proxy.h
deleted file mode 100644
index d843439fb1e2938a7016f0c5bf2fa25e8b6aef95..0000000000000000000000000000000000000000
--- a/interfaces/inner_api/app_manager/include/appmgr/native_child_notify_proxy.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * 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 OHOS_ABILITY_RUNTIME_NATIVE_CHILD_NOTIFY_PROXY_H
-#define OHOS_ABILITY_RUNTIME_NATIVE_CHILD_NOTIFY_PROXY_H
-
-#include "native_child_notify_interface.h"
-#include "iremote_proxy.h"
-
-namespace OHOS {
-namespace AppExecFwk {
-
-class NativeChildNotifyProxy : public IRemoteProxy<INativeChildNotify> {
-public:
-    explicit NativeChildNotifyProxy(const sptr<IRemoteObject> &impl);
-    virtual ~NativeChildNotifyProxy() = default;
-
-    void OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild) override;
-    void OnError(int32_t errCode) override;
-    int32_t OnNativeChildExit(int32_t pid, int32_t signal) override;
-
-private:
-    bool WriteInterfaceToken(MessageParcel &data);
-    int32_t SendRequest(uint32_t code, MessageParcel &data, MessageParcel &reply, MessageOption& option);
-
-    static inline BrokerDelegator<NativeChildNotifyProxy> delegator_;
-};
-
-} // OHOS
-} // AppExecFwk
-
-#endif // OHOS_ABILITY_RUNTIME_NATIVE_CHILD_NOTIFY_PROXY_H
\ No newline at end of file
diff --git a/interfaces/inner_api/app_manager/src/appmgr/native_child_notify_proxy.cpp b/interfaces/inner_api/app_manager/src/appmgr/native_child_notify_proxy.cpp
deleted file mode 100644
index 533799eaa6a49e3ad5266d3bd6c4d3261808bc6c..0000000000000000000000000000000000000000
--- a/interfaces/inner_api/app_manager/src/appmgr/native_child_notify_proxy.cpp
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * 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 "native_child_notify_proxy.h"
-#include "hilog_tag_wrapper.h"
-#include "ipc_types.h"
-
-namespace OHOS {
-namespace AppExecFwk {
-
-NativeChildNotifyProxy::NativeChildNotifyProxy(const sptr<IRemoteObject> &impl)
-    : IRemoteProxy<INativeChildNotify>(impl)
-{
-}
-
-bool NativeChildNotifyProxy::WriteInterfaceToken(MessageParcel &data)
-{
-    if (!data.WriteInterfaceToken(NativeChildNotifyProxy::GetDescriptor())) {
-        TAG_LOGE(AAFwkTag::APPMGR, "NativeChildNotifyProxy write interface token failed");
-        return false;
-    }
-
-    return true;
-}
-
-int32_t NativeChildNotifyProxy::SendRequest(uint32_t code, MessageParcel &data,
-    MessageParcel &reply, MessageOption& option)
-{
-    sptr<IRemoteObject> remote = Remote();
-    if (!remote) {
-        TAG_LOGE(AAFwkTag::APPMGR, "NativeChildNotifyProxy get remote object failed");
-        return ERR_NULL_OBJECT;
-    }
-
-    int32_t ret = remote->SendRequest(code, data, reply, option);
-    if (ret != NO_ERROR) {
-        TAG_LOGE(AAFwkTag::APPMGR, "NativeChildNotifyProxy SendRequest failed(%{public}d)", ret);
-        return ret;
-    }
-
-    return NO_ERROR;
-}
-
-void NativeChildNotifyProxy::OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild)
-{
-    TAG_LOGD(AAFwkTag::APPMGR, "NativeChildNotifyProxy OnNativeChildStarted");
-    MessageParcel data;
-    MessageParcel reply;
-    MessageOption option(MessageOption::TF_ASYNC);
-    if (!WriteInterfaceToken(data)) {
-        return;
-    }
-
-    if (!data.WriteRemoteObject(nativeChild)) {
-        TAG_LOGE(AAFwkTag::APPMGR, "NativeChildNotifyProxy write native child ipc object failed.");
-        return;
-    }
-
-    SendRequest(INativeChildNotify::IPC_ID_ON_NATIVE_CHILD_STARTED, data, reply, option);
-}
-
-void NativeChildNotifyProxy::OnError(int32_t errCode)
-{
-    TAG_LOGD(AAFwkTag::APPMGR, "NativeChildNotifyProxy OnError(%{public}d)", errCode);
-    MessageParcel data;
-    MessageParcel reply;
-    MessageOption option(MessageOption::TF_ASYNC);
-    if (!WriteInterfaceToken(data)) {
-        return;
-    }
-
-    if (!data.WriteInt32(errCode)) {
-        TAG_LOGE(AAFwkTag::APPMGR, "NativeChildNotifyProxy write error code failed.");
-        return;
-    }
-
-    SendRequest(INativeChildNotify::IPC_ID_ON_ERROR, data, reply, option);
-}
-
-int32_t NativeChildNotifyProxy::OnNativeChildExit(int32_t pid, int32_t signal)
-{
-    TAG_LOGD(AAFwkTag::APPMGR, "NativeChildNotifyProxy OnNativeChildExit");
-    MessageParcel data;
-    MessageParcel reply;
-    MessageOption option(MessageOption::TF_ASYNC);
-    if (!WriteInterfaceToken(data)) {
-        return ERR_NULL_OBJECT;
-    }
-
-    if (!data.WriteInt32(pid)) {
-        TAG_LOGE(AAFwkTag::APPMGR, "NativeChildNotifyProxy write native child pid failed.");
-        return ERR_NULL_OBJECT;
-    }
-
-    if (!data.WriteInt32(signal)) {
-        TAG_LOGE(AAFwkTag::APPMGR, "NativeChildNotifyProxy write native child signal failed.");
-        return ERR_NULL_OBJECT;
-    }
-
-    return SendRequest(INativeChildNotify::IPC_ID_ON_NATIVE_CHILD_EXIT, data, reply, option);
-}
-
-} // OHOS
-} // AppExecFwk
\ No newline at end of file
diff --git a/interfaces/inner_api/app_manager/src/appmgr/native_child_notify_stub.cpp b/interfaces/inner_api/app_manager/src/appmgr/native_child_notify_stub.cpp
deleted file mode 100644
index 7d1e49251544887d8822facead7fa5e820d8fbd0..0000000000000000000000000000000000000000
--- a/interfaces/inner_api/app_manager/src/appmgr/native_child_notify_stub.cpp
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * 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 "native_child_notify_stub.h"
-#include "hilog_tag_wrapper.h"
-#include "ipc_types.h"
-
-namespace OHOS {
-namespace AppExecFwk {
-
-int NativeChildNotifyStub::OnRemoteRequest(uint32_t code, MessageParcel &data,
-    MessageParcel &reply, MessageOption &option)
-{
-    TAG_LOGD(AAFwkTag::APPMGR, "NativeChildNotifyStub::OnRemoteRequest, code=%{public}u, flags=%{public}d.",
-        code, option.GetFlags());
-    std::u16string descriptor = NativeChildNotifyStub::GetDescriptor();
-    std::u16string remoteDesc = data.ReadInterfaceToken();
-    if (descriptor != remoteDesc) {
-        TAG_LOGE(AAFwkTag::APPMGR, "A local descriptor is not equivalent to a remote");
-        return ERR_INVALID_STATE;
-    }
-
-    int32_t ret;
-    switch (code) {
-        case INativeChildNotify::IPC_ID_ON_NATIVE_CHILD_STARTED:
-            ret = HandleOnNativeChildStarted(data, reply);
-            break;
-
-        case INativeChildNotify::IPC_ID_ON_NATIVE_CHILD_EXIT:
-            ret = HandleOnNativeChildExit(data, reply);
-            break;
-
-        case INativeChildNotify::IPC_ID_ON_ERROR:
-            ret = HandleOnError(data, reply);
-            break;
-        
-        default:
-            TAG_LOGW(AAFwkTag::APPMGR, "NativeChildNotifyStub Unknow ipc call(%{public}u)", code);
-            ret = IPCObjectStub::OnRemoteRequest(code, data, reply, option);
-            break;
-    }
-
-    TAG_LOGD(AAFwkTag::APPMGR, "NativeChildNotifyStub::OnRemoteRequest end");
-    return ret;
-}
-
-int32_t NativeChildNotifyStub::HandleOnNativeChildStarted(MessageParcel &data, MessageParcel &reply)
-{
-    sptr<IRemoteObject> cb = data.ReadRemoteObject();
-    OnNativeChildStarted(cb);
-    return ERR_NONE;
-}
-
-int32_t NativeChildNotifyStub::HandleOnNativeChildExit(MessageParcel &data, MessageParcel &reply)
-{
-    int pid = data.ReadInt32();
-    int signal = data.ReadInt32();
-    return OnNativeChildExit(pid, signal);
-}
-
-int32_t NativeChildNotifyStub::HandleOnError(MessageParcel &data, MessageParcel &reply)
-{
-    int32_t err = data.ReadInt32();
-    OnError(err);
-    return ERR_NONE;
-}
-
-} // OHOS
-} // AppExecFwk
diff --git a/interfaces/inner_api/child_process_manager/include/native_child_ipc_process.h b/interfaces/inner_api/child_process_manager/include/native_child_ipc_process.h
index 5a007069e87a215803738223958fb1eb2edb77e5..f69b5fb9144b1bf03636891c8d6da1bf8eed749f 100644
--- a/interfaces/inner_api/child_process_manager/include/native_child_ipc_process.h
+++ b/interfaces/inner_api/child_process_manager/include/native_child_ipc_process.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Copyright (c) 2024-2025 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
@@ -18,7 +18,7 @@
 
 #include <memory>
 #include "child_process.h"
-#include "native_child_notify_interface.h"
+#include "inative_child_notify.h"
 #include "ipc_inner_object.h"
 
 namespace OHOS {
diff --git a/services/appmgr/include/app_mgr_service_inner.h b/services/appmgr/include/app_mgr_service_inner.h
index 4f4588802e2f10fd120223cd4dad8da384b76e64..33fca399edbb310f79426c586b206ae771d3aacc 100644
--- a/services/appmgr/include/app_mgr_service_inner.h
+++ b/services/appmgr/include/app_mgr_service_inner.h
@@ -61,6 +61,7 @@
 #include "iapp_state_callback.h"
 #include "iapplication_state_observer.h"
 #include "iconfiguration_observer.h"
+#include "inative_child_notify.h"
 #include "iremote_object.h"
 #include "irender_state_observer.h"
 #include "istart_specified_ability_response.h"
@@ -82,7 +83,6 @@
 #include "running_multi_info.h"
 #include "multi_user_config_mgr.h"
 #include "iuser_callback.h"
-#include "native_child_notify_interface.h"
 
 namespace OHOS {
 namespace AbilityRuntime {
diff --git a/services/appmgr/include/app_native_spawn_manager.h b/services/appmgr/include/app_native_spawn_manager.h
index 31f4a2793c73353edc93a1ed093259274daca8db..0fcfd4153ecdd4910f9b989724399031cd673bfe 100644
--- a/services/appmgr/include/app_native_spawn_manager.h
+++ b/services/appmgr/include/app_native_spawn_manager.h
@@ -20,7 +20,7 @@
 #include <string>
 #include "nocopyable.h"
 #include "app_running_manager.h"
-#include "native_child_notify_interface.h"
+#include "inative_child_notify.h"
 
 namespace OHOS {
 namespace AppExecFwk {
diff --git a/test/fuzztest/abilityinterfacesappmgrnativechildnotifyproxy_fuzzer/abilityinterfacesappmgrnativechildnotifyproxy_fuzzer.cpp b/test/fuzztest/abilityinterfacesappmgrnativechildnotifyproxy_fuzzer/abilityinterfacesappmgrnativechildnotifyproxy_fuzzer.cpp
index 0a571fa70c90061c765a4c90103997ff74b4cb92..3b8a5210b42f769469e9e647028e18dec6e8079d 100644
--- a/test/fuzztest/abilityinterfacesappmgrnativechildnotifyproxy_fuzzer/abilityinterfacesappmgrnativechildnotifyproxy_fuzzer.cpp
+++ b/test/fuzztest/abilityinterfacesappmgrnativechildnotifyproxy_fuzzer/abilityinterfacesappmgrnativechildnotifyproxy_fuzzer.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Copyright (c) 2024-2025 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
@@ -19,8 +19,8 @@
 #include <cstdint>
 
 #define private public
+#include "inative_child_notify.h"
 #include "native_child_notify_proxy.h"
-#include "native_child_notify_interface.h"
 #undef private
 
 #include "securec.h"
@@ -72,21 +72,6 @@ bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
     infosProxy->OnNativeChildStarted(nativeChild);
     int32_t errCode = static_cast<int32_t>(GetU32Data(data));
     infosProxy->OnError(errCode);
-    MessageParcel parcel;
-    parcel.WriteInterfaceToken(AMSMGR_INTERFACE_TOKEN);
-    parcel.WriteBuffer(data, size);
-    parcel.RewindRead(0);
-    MessageParcel parcels;
-    parcels.WriteInterfaceToken(AMSMGR_INTERFACE_TOKEN);
-    parcels.WriteBuffer(data, size);
-    parcels.RewindRead(0);
-    infosProxy->WriteInterfaceToken(parcels);
-    uint32_t codeOne = static_cast<uint32_t>(INPUT_ZERO);
-    MessageParcel reply;
-    MessageOption option;
-    infosProxy->SendRequest(codeOne, parcel, reply, option);
-    uint32_t codeTwo = static_cast<uint32_t>(INPUT_ONE);
-    infosProxy->SendRequest(codeTwo, parcel, reply, option);
     return true;
 }
 }
diff --git a/test/fuzztest/abilityinterfacesappmgrnativechildnotifystub_fuzzer/abilityinterfacesappmgrnativechildnotifystub_fuzzer.cpp b/test/fuzztest/abilityinterfacesappmgrnativechildnotifystub_fuzzer/abilityinterfacesappmgrnativechildnotifystub_fuzzer.cpp
index ac67588a931237589c45bd4df7d94419c08e12ad..68361148c332a9b9c0cd60ba35d63ba86667bb16 100644
--- a/test/fuzztest/abilityinterfacesappmgrnativechildnotifystub_fuzzer/abilityinterfacesappmgrnativechildnotifystub_fuzzer.cpp
+++ b/test/fuzztest/abilityinterfacesappmgrnativechildnotifystub_fuzzer/abilityinterfacesappmgrnativechildnotifystub_fuzzer.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Copyright (c) 2024-2025 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
@@ -20,8 +20,8 @@
 
 #define private public
 #define protected public
+#include "inative_child_notify.h"
 #include "native_child_notify_stub.h"
-#include "native_child_notify_interface.h"
 #undef protected
 #undef private
 
@@ -58,9 +58,18 @@ public:
     virtual ~ NativeChildNotifyStubFUZZ() {};
     int OnRemoteRequest(
         uint32_t code, MessageParcel &data, MessageParcel &reply, MessageOption &option) override{ return 0; };
-    void OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild) override{};
-    void OnError(int32_t errCode) override{};
-    int32_t OnNativeChildExit(int32_t pid, int32_t signal) override{ return 0; };
+    ErrCode OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild) override
+   {
+        return ERR_OK;
+    }
+    ErrCode OnError(int32_t errCode) override
+    {
+        return ERR_OK;
+    }
+    ErrCode OnNativeChildExit(int32_t pid, int32_t signal) override
+    {
+        return ERR_OK;
+    }
 };
 
 sptr<Token> GetFuzzAbilityToken()
@@ -79,7 +88,7 @@ sptr<Token> GetFuzzAbilityToken()
 
 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
 {
-    uint32_t code = static_cast<uint32_t>(INativeChildNotify::IPC_ID_ON_NATIVE_CHILD_STARTED);
+    uint32_t code = static_cast<uint32_t>(INativeChildNotifyIpcCode::COMMAND_ON_NATIVE_CHILD_STARTED);
     MessageParcel parcel;
     parcel.WriteInterfaceToken(NATIVE_CHILD_NOTIFY_TOKEN);
     parcel.WriteBuffer(data, size);
@@ -88,7 +97,7 @@ bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
     MessageOption option;
     std::shared_ptr<NativeChildNotifyStubFUZZ> abms = std::make_shared<NativeChildNotifyStubFUZZ>();
     abms->OnRemoteRequest(code, parcel, reply, option);
-    code = static_cast<uint32_t>(INativeChildNotify::IPC_ID_ON_ERROR);
+    code = static_cast<uint32_t>(INativeChildNotifyIpcCode::COMMAND_ON_ERROR);
     abms->OnRemoteRequest(code, parcel, reply, option);
     return true;
 }
diff --git a/test/unittest/BUILD.gn b/test/unittest/BUILD.gn
index 88c49ffabd1c02478f8f28cef43f7d8a446f3d25..56ca4fa8c83c1573bf757d095ed662a4f72b7514 100644
--- a/test/unittest/BUILD.gn
+++ b/test/unittest/BUILD.gn
@@ -43,8 +43,6 @@ ohos_source_set("appmgr_test_source") {
     "${ability_runtime_innerkits_path}/app_manager/src/appmgr/app_scheduler_host.cpp",
     "${ability_runtime_innerkits_path}/app_manager/src/appmgr/app_scheduler_proxy.cpp",
     "${ability_runtime_innerkits_path}/app_manager/src/appmgr/fault_data.cpp",
-    "${ability_runtime_innerkits_path}/app_manager/src/appmgr/native_child_notify_proxy.cpp",
-    "${ability_runtime_innerkits_path}/app_manager/src/appmgr/native_child_notify_stub.cpp",
     "${ability_runtime_innerkits_path}/app_manager/src/appmgr/process_info.cpp",
     "${ability_runtime_innerkits_path}/app_manager/src/appmgr/profile.cpp",
     "${ability_runtime_innerkits_path}/app_manager/src/appmgr/render_scheduler_host.cpp",
diff --git a/test/unittest/ams_ipc_interface_test/ams_ipc_appmgr_interface_test.cpp b/test/unittest/ams_ipc_interface_test/ams_ipc_appmgr_interface_test.cpp
index f12b91f70f0075cdee33a2b1804e0711e77bd3ec..6372eb3d018a914c79611163a73029b1a4be5f70 100644
--- a/test/unittest/ams_ipc_interface_test/ams_ipc_appmgr_interface_test.cpp
+++ b/test/unittest/ams_ipc_interface_test/ams_ipc_appmgr_interface_test.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2025 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
@@ -45,9 +45,18 @@ public:
     NativeChildCallbackMock() = default;
     virtual ~NativeChildCallbackMock() = default;
     
-    void OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild) {}
-    void OnError(int32_t errCode) {}
-    int32_t OnNativeChildExit(int32_t pid, int32_t signal) { return 0; }
+    ErrCode OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild)
+    {
+        return ERR_OK;
+    }
+    ErrCode OnError(int32_t errCode)
+    {
+        return ERR_OK;
+    }
+    ErrCode OnNativeChildExit(int32_t pid, int32_t signal)
+    {
+        return ERR_OK;
+    }
 };
 
 class AmsIpcAppMgrInterfaceTest : public testing::Test {
diff --git a/test/unittest/app_mgr_stub_test/app_mgr_stub_test.cpp b/test/unittest/app_mgr_stub_test/app_mgr_stub_test.cpp
index 7cdbab6100cb6b8934dde76ddf2957e339c410c8..1de9b86baf1e0818f3958c50a8c2d553e729f595 100644
--- a/test/unittest/app_mgr_stub_test/app_mgr_stub_test.cpp
+++ b/test/unittest/app_mgr_stub_test/app_mgr_stub_test.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022-2024 Huawei Device Co., Ltd.
+ * Copyright (c) 2022-2025 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
@@ -58,9 +58,18 @@ public:
     NativeChildCallbackMock() = default;
     virtual ~NativeChildCallbackMock() = default;
 
-    void OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild) {}
-    void OnError(int32_t errCode) {}
-    int32_t OnNativeChildExit(int32_t pid, int32_t signal) { return 0; }
+    ErrCode OnNativeChildStarted(const sptr<IRemoteObject> &nativeChild)
+    {
+        return ERR_OK;
+    }
+    ErrCode OnError(int32_t errCode)
+    {
+        return ERR_OK;
+    }
+    ErrCode OnNativeChildExit(int32_t pid, int32_t signal)
+    {
+        return ERR_OK;
+    }
 };
 
 class AppMgrStubTest : public testing::Test {