diff --git a/ability/ability_runtime/child_process/libchild_process.ndk.json b/ability/ability_runtime/child_process/libchild_process.ndk.json
index 6f6bdcebf52d519ab862738a444bbdc8ae0a2a04..7dcaf85d2ffaf13aed27138f27d68b2a2413f3b9 100644
--- a/ability/ability_runtime/child_process/libchild_process.ndk.json
+++ b/ability/ability_runtime/child_process/libchild_process.ndk.json
@@ -10,5 +10,13 @@
   {
       "first_introduced": "17",
       "name": "OH_Ability_GetCurrentChildProcessArgs"
+  },
+  {
+      "first_introduced": "20",
+      "name": "OH_Ability_RegisterNativeChildProcessExitCallback"
+  },
+  {
+      "first_introduced": "20",
+      "name": "OH_Ability_UnregisterNativeChildProcessExitCallback"
   }
-]
\ No newline at end of file
+]
diff --git a/ability/ability_runtime/child_process/native_child_process.h b/ability/ability_runtime/child_process/native_child_process.h
index ca195fdefad29793d3711a5fc3b03084cf25f7d1..69a72e273cb525c3c2fe3466c7a8a0845c0c34ee 100644
--- a/ability/ability_runtime/child_process/native_child_process.h
+++ b/ability/ability_runtime/child_process/native_child_process.h
@@ -111,6 +111,12 @@ typedef enum Ability_NativeChildProcess_ErrCode {
      * An invalid IPC object pointer may be returned.
      */
     NCP_ERR_CONNECTION_FAILED = 16010008,
+
+    /**
+     * @error The callback does not exist; it may not have been registered or has already been unregistered.
+     * @since 20
+     */
+    NCP_ERR_CALLBACK_NOT_EXIST = 16010009,
 } Ability_NativeChildProcess_ErrCode;
 
 
@@ -288,6 +294,45 @@ Ability_NativeChildProcess_ErrCode OH_Ability_StartNativeChildProcess(
  */
 NativeChildProcess_Args* OH_Ability_GetCurrentChildProcessArgs();
 
+/**
+ * @brief Define a callback function to handle the exit of a native child process.
+ *
+ * @param pid The pid of the exited native child process.
+ * @param signal The signal of the exited native child process.
+ * @since 20
+ */
+typedef void (*OH_Ability_OnNativeChildProcessExit)(int32_t pid, int32_t signal);
+
+/**
+ * @brief Register a native child process exit callback.
+ * Registering the same callback repeatedly will only keep one.
+ *
+ * @param onProcessExit Pointer to the callback function to handle the exit of a native child process.
+ * For details, see {@link OH_Ability_OnNativeChildProcessExit}.
+ * @return Returns {@link NCP_NO_ERROR} if the call is successful.
+ *         Returns {@link NCP_ERR_INVALID_PARAM} if the param is invalid.
+ *         Returns {@link NCP_ERR_INTERNAL} if internal error occurs.
+ *         For details, see {@link Ability_NativeChildProcess_ErrCode}.
+ * @since 20
+ */
+Ability_NativeChildProcess_ErrCode OH_Ability_RegisterNativeChildProcessExitCallback(
+    OH_Ability_OnNativeChildProcessExit onProcessExit);
+
+/**
+ * @brief Unregister a native child process exit callback.
+ *
+ * @param onProcessExit Pointer to the callback function to handle the exit of a native child process.
+ * For details, see {@link OH_Ability_OnNativeChildProcessExit}.
+ * @return Returns {@link NCP_NO_ERROR} if the call is successful.
+ *         Returns {@link NCP_ERR_INVALID_PARAM} if the param is invalid.
+ *         Returns {@link NCP_ERR_INTERNAL} if internal error occurs.
+ *         Returns {@link NCP_ERR_CALLBACK_NOT_EXIST} if the callback is not exist.
+ *         For details, see {@link Ability_NativeChildProcess_ErrCode}.
+ * @since 20
+ */
+Ability_NativeChildProcess_ErrCode OH_Ability_UnregisterNativeChildProcessExitCallback(
+    OH_Ability_OnNativeChildProcessExit onProcessExit);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif