diff --git a/services/continuous_task/src/config_change_observer.cpp b/services/continuous_task/src/config_change_observer.cpp
index d47796d52241768e712613d6ce86d2ded2c41ea7..01232d1c4de00bd882a08d4918450fa7d2efcd31 100644
--- a/services/continuous_task/src/config_change_observer.cpp
+++ b/services/continuous_task/src/config_change_observer.cpp
@@ -48,7 +48,12 @@ void ConfigChangeObserver::OnConfigurationUpdated(const AppExecFwk::Configuratio
     auto task = [this, configuration]() {
         this->bgContinuousTaskMgr_.lock()->OnConfigurationChanged(configuration);
     };
-    handler_.lock()->PostTask(task);
+
+    auto handler = handler_.lock();
+    if (handler == nullptr) {
+        return;
+    }
+    handler->PostTask(task);
 }
 }
 }
\ No newline at end of file