diff --git a/interfaces/kits/napi/ans/include/subscribe.h b/interfaces/kits/napi/ans/include/subscribe.h
index 7c7122b70f35e184de5e281a961938df3e59cd2e..193de4582d67a284e65dcf57e9b00e5da27ac466 100644
--- a/interfaces/kits/napi/ans/include/subscribe.h
+++ b/interfaces/kits/napi/ans/include/subscribe.h
@@ -94,7 +94,7 @@ 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);