diff --git a/frameworks/native/backup_ext/include/ext_backup_js.h b/frameworks/native/backup_ext/include/ext_backup_js.h
index d81bd62f80b08c8c1d4f78abbbeaedc0c8fe9d4f..7f26d84b367877c4c450b86328996b438dfbc92c 100644
--- a/frameworks/native/backup_ext/include/ext_backup_js.h
+++ b/frameworks/native/backup_ext/include/ext_backup_js.h
@@ -138,12 +138,8 @@ public:
     ErrCode OnProcess(std::function<void(ErrCode, const std::string)> callback) override;
 
 public:
-    explicit ExtBackupJs(AbilityRuntime::JsRuntime &jsRuntime) : jsRuntime_(jsRuntime) {}
-    ~ExtBackupJs()
-    {
-        jsRuntime_.FreeNativeReference(std::move(jsObj_));
-    }
-
+    explicit ExtBackupJs(AbilityRuntime::JsRuntime &jsRuntime);
+    ~ExtBackupJs();
 private:
     int CallJsMethod(const std::string &funcName,
                      AbilityRuntime::JsRuntime &jsRuntime,
diff --git a/frameworks/native/backup_ext/src/ext_backup_js.cpp b/frameworks/native/backup_ext/src/ext_backup_js.cpp
index c0fecddaa0b0f3d0045eb884fa996a871548e455..940961200433214bcee2f44005c3d6ff747c196c 100644
--- a/frameworks/native/backup_ext/src/ext_backup_js.cpp
+++ b/frameworks/native/backup_ext/src/ext_backup_js.cpp
@@ -46,6 +46,8 @@
 namespace OHOS::FileManagement::Backup {
 using namespace std;
 constexpr size_t ARGC_ONE = 1;
+static std::mutex g_extBackupValidLock;
+static bool g_isExtBackupValid = true;
 
 static string GetSrcPath(const AppExecFwk::AbilityInfo &info)
 {
@@ -103,6 +105,11 @@ static napi_status DealNapiException(napi_env env, napi_value &exception, std::s
 
 static napi_value PromiseCallback(napi_env env, napi_callback_info info)
 {
+    std::lock_guard<std::mutex> lock(g_extBackupValidLock);
+    if (!g_isExtBackupValid) {
+        HILOGE("ExtBackup is invalid");
+        return nullptr;
+    }
     HILOGI("Promise callback.");
     void *data = nullptr;
     if (napi_get_cb_info(env, info, nullptr, 0, nullptr, &data) != napi_ok) {
@@ -140,6 +147,12 @@ static napi_value PromiseCatchCallback(napi_env env, napi_callback_info info)
         HILOGE("Failed to throw an exception, %{public}d", throwStatus);
         return nullptr;
     }
+    std::lock_guard<std::mutex> lock(g_extBackupValidLock);
+    if (!g_isExtBackupValid) {
+        HILOGE("ExtBackup is invalid");
+        data = nullptr;
+        return nullptr;
+    }
     callbackInfo->callback(BError(BError::Codes::EXT_THROW_EXCEPTION), exceptionInfo);
     data = nullptr;
     HILOGI("Promise catch callback end.");
@@ -148,6 +161,11 @@ static napi_value PromiseCatchCallback(napi_env env, napi_callback_info info)
 
 static napi_value PromiseCallbackEx(napi_env env, napi_callback_info info)
 {
+    std::lock_guard<std::mutex> lock(g_extBackupValidLock);
+    if (!g_isExtBackupValid) {
+        HILOGE("ExtBackup is invalid");
+        return nullptr;
+    }
     HILOGI("PromiseEx callback.");
     void *data = nullptr;
     std::string str;
@@ -185,6 +203,12 @@ static napi_value PromiseCatchCallbackEx(napi_env env, napi_callback_info info)
         HILOGE("Failed to throw an exception, %{public}d", throwStatus);
         return nullptr;
     }
+    std::lock_guard<std::mutex> lock(g_extBackupValidLock);
+    if (!g_isExtBackupValid) {
+        HILOGE("ExtBackup is invalid");
+        data = nullptr;
+        return nullptr;
+    }
     callbackInfoEx->callbackParam(BError(BError::Codes::EXT_THROW_EXCEPTION), exceptionInfo);
     data = nullptr;
     HILOGI("PromiseEx catch callback end.");
@@ -422,6 +446,20 @@ napi_value AttachBackupExtensionContext(napi_env env, void *value, void *)
     return contextObj;
 }
 
+ExtBackupJs::ExtBackupJs(AbilityRuntime::JsRuntime &jsRuntime) : jsRuntime_(jsRuntime)
+{
+    g_isExtBackupValid = true;
+    HILOGI("ExtBackupJs::ExtBackupJs.");
+}
+
+ExtBackupJs::~ExtBackupJs()
+{
+    jsRuntime_.FreeNativeReference(std::move(jsObj_));
+    std::lock_guard<std::mutex> lock(g_extBackupValidLock);
+    g_isExtBackupValid = false;
+    HILOGI("ExtBackupJs::~ExtBackupJs.");
+}
+
 void ExtBackupJs::ExportJsContext(void)
 {
     auto env = jsRuntime_.GetNapiEnv();