diff --git a/src/util/src/tcache.c b/src/util/src/tcache.c
index aaa1d5ba9ea5eff91ce2853f6bb29a9204a66e1c..8d538e37bc6e3a35b05703de485189c703f3c0d7 100644
--- a/src/util/src/tcache.c
+++ b/src/util/src/tcache.c
@@ -720,8 +720,6 @@ void* taosCacheTimedRefresh(void *handle) {
         continue;
       }
 
-      pthread_mutex_unlock(&guard);
-
       if ((count % pCacheObj->checkTick) != 0) {
         continue;
       }
@@ -741,6 +739,8 @@ void* taosCacheTimedRefresh(void *handle) {
       }
 
       taosTrashcanEmpty(pCacheObj, false);
+
+      pthread_mutex_unlock(&guard);
     }
   }