diff --git a/backend/src/main/java/io/dataease/service/panel/PanelLinkService.java b/backend/src/main/java/io/dataease/service/panel/PanelLinkService.java
index 4048fe7fb5..d5a8abca72 100644
--- a/backend/src/main/java/io/dataease/service/panel/PanelLinkService.java
+++ b/backend/src/main/java/io/dataease/service/panel/PanelLinkService.java
@@ -119,7 +119,7 @@ public class PanelLinkService {
     public Boolean validateHeads(PanelLink panelLink) throws Exception{
         HttpServletRequest request = ServletUtils.request();
         String token = request.getHeader("LINK-PWD-TOKEN");
-        if (StringUtils.isEmpty(token)) return false;
+        if (StringUtils.isEmpty(token) || StringUtils.equals("undefined", token) || StringUtils.equals("null", token)) return false;
         boolean verify = JWTUtils.verifyLink(token, panelLink.getResourceId(), decryptParam(panelLink.getPwd()));
         return verify;
     }