diff --git a/core/class/perm/perm_check.php b/core/class/perm/perm_check.php
index 9cfa360..ba84f2e 100644
--- a/core/class/perm/perm_check.php
+++ b/core/class/perm/perm_check.php
@@ -161,7 +161,7 @@ class perm_check{
     //$arr=array('uid','gid','desktop');其中这几项必须
     function checkperm($action,$arr,$bz=''){ //检查某个图标是否有权限;
         global $_G;
-        if ($arr['preview']) {
+        if ($arr['preview'] && ($action=='read') || $action=='copy' || $action=='download') {
             return true;
         }
         if($_G['uid']<1){ //游客没有权限