diff --git a/interfaces/kits/napi/ans/include/subscribe.h b/interfaces/kits/napi/ans/include/subscribe.h
index b18e1de4b0bc547caf963db874b64bed9d702eae..b48a83d516420ff4c981afcb9a2eb3ea5f028a7b 100644
--- a/interfaces/kits/napi/ans/include/subscribe.h
+++ b/interfaces/kits/napi/ans/include/subscribe.h
@@ -88,7 +88,7 @@ struct SubscriberInstancesInfo {
 };
 
 static std::mutex mutex_;
-static std::vector<SubscriberInstancesInfo> subscriberInstances_;
+static thread_local std::vector<SubscriberInstancesInfo> subscriberInstances_;
 
 bool HasNotificationSubscriber(const napi_env &env, const napi_value &value, SubscriberInstancesInfo &subscriberInfo);
 bool AddSubscriberInstancesInfo(const napi_env &env, const SubscriberInstancesInfo &subscriberInfo);