diff --git a/common.php b/common.php
index 30c3c1e..35b1173 100644
--- a/common.php
+++ b/common.php
@@ -303,6 +303,7 @@ function main($path)
     if ($_SERVER['ajax']) {
         if ($_GET['action']=='del_upload_cache') {
             // del '.tmp' without login. 无需登录即可删除.tmp后缀文件
+            savecache('path_' . $path1, '', $_SERVER['disktag'], 1); // clear cache.
             return $drive->del_upload_cache($path);
         }
         if ($_GET['action']=='upbigfile') {