diff --git a/services/ans/src/advanced_notification_service.cpp b/services/ans/src/advanced_notification_service.cpp
index a2e51342fbac301aed91ac9649636f5e6b7cc94d..ee672b8df7ac9367058c68ee7ab52d26af1627ec 100644
--- a/services/ans/src/advanced_notification_service.cpp
+++ b/services/ans/src/advanced_notification_service.cpp
@@ -2063,7 +2063,7 @@ inline void RemoveExpired(
 {
     auto iter = list.begin();
     while (iter != list.end()) {
-        if (now - *iter > std::chrono::seconds(1)) {
+        if (abs(now - *iter) > std::chrono::seconds(1)) {
             iter = list.erase(iter);
         } else {
             break;