diff --git a/services/backup_sa/include/module_ipc/svc_session_manager.h b/services/backup_sa/include/module_ipc/svc_session_manager.h
index 82308a60cf7cd5d2d0754b35682fc830b74910f6..1c0dc1d6cf0733f778a8bcc33ce71252d9f44de2 100644
--- a/services/backup_sa/include/module_ipc/svc_session_manager.h
+++ b/services/backup_sa/include/module_ipc/svc_session_manager.h
@@ -272,6 +272,14 @@ public:
      */
     bool GetNeedToInstall(const std::string &bundleName);
 
+    /**
+     * @brief Whether to unload the service
+     *
+     * @return true
+     * @return false
+     */
+    bool NeedToUnloadService();
+
 private:
     /**
      * @brief 获取backup extension ability
diff --git a/services/backup_sa/include/module_sched/sched_scheduler.h b/services/backup_sa/include/module_sched/sched_scheduler.h
index 63dfd299da453d3d17613482b8b0929d621651d6..cf9a086d18c64e040d0b6d76a0c66317e63e5b2e 100644
--- a/services/backup_sa/include/module_sched/sched_scheduler.h
+++ b/services/backup_sa/include/module_sched/sched_scheduler.h
@@ -65,6 +65,7 @@ public:
     void StartTimer()
     {
         extTime_.Setup();
+        UnloadServiceTimer();
     }
 
 public:
@@ -90,6 +91,12 @@ private:
      */
     void InstallingState(const std::string &bundleName);
 
+    /**
+     * @brief unload service timer
+     *
+     */
+    void UnloadServiceTimer();
+
 private:
     mutable std::shared_mutex lock_;
     OHOS::ThreadPool threadPool_;
diff --git a/services/backup_sa/src/module_ipc/svc_session_manager.cpp b/services/backup_sa/src/module_ipc/svc_session_manager.cpp
index 93bed643711d55800837e7c5de66d95c30535f4d..f40291e698e5f908497e4204b483766de2874944 100644
--- a/services/backup_sa/src/module_ipc/svc_session_manager.cpp
+++ b/services/backup_sa/src/module_ipc/svc_session_manager.cpp
@@ -376,7 +376,7 @@ void SvcSessionManager::AppendBundles(const vector<BundleName> &bundleNames)
     if (!impl_.clientToken) {
         throw BError(BError::Codes::SA_INVAL_ARG, "No caller token was specified");
     }
-    
+
     for (auto &&bundleName : bundleNames) {
         BackupExtInfo info {};
         info.backUpConnection = GetBackupExtAbility(bundleName);
@@ -478,4 +478,13 @@ bool SvcSessionManager::GetNeedToInstall(const std::string &bundleName)
     auto it = GetBackupExtNameMap(bundleName);
     return it->second.bNeedToInstall;
 }
+
+bool SvcSessionManager::NeedToUnloadService()
+{
+    unique_lock<shared_mutex> lock(lock_);
+    if (!impl_.clientToken || !impl_.clientToken || !impl_.clientProxy || !impl_.backupExtNameMap.size()) {
+        return true;
+    }
+    return false;
+}
 } // namespace OHOS::FileManagement::Backup
\ No newline at end of file
diff --git a/services/backup_sa/src/module_sched/sched_scheduler.cpp b/services/backup_sa/src/module_sched/sched_scheduler.cpp
index e54e26a2350f1335f371b88f52baa346c627be5e..557539e4d1c75f767bf09ab1f1ca9efa72f33e79 100644
--- a/services/backup_sa/src/module_sched/sched_scheduler.cpp
+++ b/services/backup_sa/src/module_sched/sched_scheduler.cpp
@@ -27,10 +27,12 @@
 
 #include "b_error/b_error.h"
 #include "filemgmt_libhilog.h"
+#include "iservice_registry.h"
 #include "module_external/bms_adapter.h"
 #include "module_external/inner_receiver_impl.h"
 #include "module_ipc/service.h"
 #include "module_ipc/svc_session_manager.h"
+#include "system_ability_definition.h"
 
 namespace OHOS::FileManagement::Backup {
 using namespace std;
@@ -147,6 +149,30 @@ void SchedScheduler::InstallingState(const string &bundleName)
     }
 }
 
+void SchedScheduler::UnloadServiceTimer()
+{
+    auto tryUnload = [sessionPtr {sessionPtr_}]() {
+        auto ptr = sessionPtr.promote();
+        if (ptr && !ptr->NeedToUnloadService()) {
+            return;
+        }
+        HILOGI("Unload system ability");
+        sptr<ISystemAbilityManager> saManager =
+            OHOS::SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
+        if (saManager == nullptr) {
+            HILOGE("UnloadSA, GetSystemAbilityManager is null.");
+            return;
+        }
+        int32_t result = saManager->UnloadSystemAbility(FILEMANAGEMENT_BACKUP_SERVICE_SA_ID);
+        if (result != ERR_OK) {
+            HILOGE("UnloadSA, UnloadSystemAbility result: %{public}d", result);
+            return;
+        }
+    };
+    int checkingIntervalInMs = 30000;
+    extTime_.Register(tryUnload, checkingIntervalInMs);
+}
+
 void SchedScheduler::InstallSuccess(const std::string &bundleName, const int32_t resultCode)
 {
     if (!resultCode) {