diff --git a/services/param/trigger/trigger_manager.c b/services/param/trigger/trigger_manager.c
index 982a983dfc020dedcf5cb6d5c809d73d73208039..f854b2836cd4a60a474c92452359773f7bcbf779 100644
--- a/services/param/trigger/trigger_manager.c
+++ b/services/param/trigger/trigger_manager.c
@@ -212,6 +212,10 @@ static void DelWatchTrigger_(const TriggerWorkSpace *workSpace, TriggerNode *tri
     }
     PARAM_LOGV("DelWatchTrigger_ %s count %d", GetTriggerName(trigger), triggerHead->triggerCount);
     triggerHead->triggerCount--;
+    if (trigger->condition != NULL) {
+        free(trigger->condition);
+        trigger->condition = NULL;
+    }
     free(trigger);
 }