diff --git a/designer-base/src/main/java/com/fr/design/ui/Assistant.java b/designer-base/src/main/java/com/fr/design/ui/Assistant.java
index 6a04cf358..7bbc17a80 100644
--- a/designer-base/src/main/java/com/fr/design/ui/Assistant.java
+++ b/designer-base/src/main/java/com/fr/design/ui/Assistant.java
@@ -59,7 +59,8 @@ public class Assistant {
         if (path.endsWith(".svg")) {
             return "image/svg+xml";
         }
-        if (path.endsWith(".png")) {
+        // upm 文件夹中的图片如果返回 Content-type 为 image/png 时会显示异常
+        if (path.endsWith(".png") && !path.contains("/upm")) {
             return "image/png";
         }
         if (path.endsWith(".woff")) {