diff --git a/bonus-modules/bonus-material/src/main/java/com/bonus/material/back/service/impl/BackApplyInfoServiceImpl.java b/bonus-modules/bonus-material/src/main/java/com/bonus/material/back/service/impl/BackApplyInfoServiceImpl.java
index e64f38b4..eb1ca04b 100644
--- a/bonus-modules/bonus-material/src/main/java/com/bonus/material/back/service/impl/BackApplyInfoServiceImpl.java
+++ b/bonus-modules/bonus-material/src/main/java/com/bonus/material/back/service/impl/BackApplyInfoServiceImpl.java
@@ -292,7 +292,7 @@ public class BackApplyInfoServiceImpl implements IBackApplyInfoService {
         // 设置制单人签名url
         if (StringUtils.isNotBlank(backApplyInfo.getSignUrl())) {
             if (!backApplyInfo.getSignUrl().startsWith("http")) {
-                backApplyInfo.setSignUrl("data:image/png;base64," + backApplyInfo.getBackSignUrl());
+                backApplyInfo.setSignUrl("data:image/png;base64," + backApplyInfo.getSignUrl());
             }
         }