diff --git a/backgroundtasks/transient/include/transient_task_api.h b/backgroundtasks/transient/include/transient_task_api.h
index 874e6473412e80b3b68cfffa268e78dde2c27ecc..7fcc0c23a878b5b1ff249f68eb098c4981b386ed 100644
--- a/backgroundtasks/transient/include/transient_task_api.h
+++ b/backgroundtasks/transient/include/transient_task_api.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
@@ -100,6 +100,21 @@ int32_t OH_BackgroundTaskManager_GetRemainingDelayTime(int32_t requestId, int32_
  */
 int32_t OH_BackgroundTaskManager_CancelSuspendDelay(int32_t requestId);
 
+/**
+ * @brief Obtains all the transient task before an application enters the suspended state.
+ *
+ * @param transientTaskInfo Indicates the transient task info of an application.
+ * @return {@link ERR_TRANSIENT_TASK_OK} 0 - Success.
+ *         {@link ERR_TRANSIENT_TASK_INVALID_PARAM} 401 - Invalid parameter.
+ *         {@link ERR_TRANSIENT_TASK_PARCEL_FAILED} 9800001 - Memory operation failed.
+ *         {@link ERR_TRANSIENT_TASK_PARCEL_FAILED} 9800002 - Parcelable failed.
+ *         {@link ERR_TRANSIENT_TASK_SYS_NOT_READY} 9800004 - System service not ready.
+ * @syscap SystemCapability.ResourceSchedule.BackgroundTaskManager.TransientTask
+ * @since 20
+ * @version 1.0
+ */
+int32_t OH_BackgroundTaskManager_GetAllTransientTasks(TransientTask_TransientTaskInfo  *transientTaskInfo);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/backgroundtasks/transient/include/transient_task_type.h b/backgroundtasks/transient/include/transient_task_type.h
index 7a19adf75c8050b3d4c23f5eec1dc1a8ab00b183..6cca71caff8a92d0d8972721019ff329fe7fa138 100644
--- a/backgroundtasks/transient/include/transient_task_type.h
+++ b/backgroundtasks/transient/include/transient_task_type.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
@@ -37,6 +37,7 @@
 #define OHOS_BACKGROUOND_TASK_MANAGER_TRANSIENT_TASK_TYPE_H
 
 #include <stdint.h>
+#include <vector>
 
 #ifdef __cplusplus
 extern "C" {
@@ -91,6 +92,19 @@ typedef struct TransientTask_DelaySuspendInfo {
     int32_t actualDelayTime;
 } TransientTask_DelaySuspendInfo;
 
+/**
+ * @brief Define CallBack Info for an application.
+ *
+ * @since 20
+ * @version 1.0
+ */
+typedef struct TransientTask_TransientTaskInfo {
+    /** The remaining quota of the delay request */
+    int32_t remainingQuota;
+    /** The info of delay suspend */
+    std::vector<TransientTask_DelaySuspendInfo> transientTasks;
+} TransientTask_TransientTaskInfo;
+
 /**
  * @brief Define a callback function when delay time expired.
  * @since 13
diff --git a/backgroundtasks/transient/libtransient_task.ndk.json b/backgroundtasks/transient/libtransient_task.ndk.json
index df952bfe1d139048cdf28ba8f1a65bbfec7dbb7f..5d777b0199821083afb17eec109e90fe93bcb50e 100644
--- a/backgroundtasks/transient/libtransient_task.ndk.json
+++ b/backgroundtasks/transient/libtransient_task.ndk.json
@@ -10,5 +10,9 @@
     { 
         "first_introduced": "13",
         "name": "OH_BackgroundTaskManager_CancelSuspendDelay"
+    },
+    { 
+        "first_introduced": "20",
+        "name": "OH_BackgroundTaskManager_GetAllTransientTasks"
     }
 ]
\ No newline at end of file