diff --git a/daxpay-open-sdk/src/main/java/org/dromara/daxpay/sdk/util/PaySignUtil.java b/daxpay-open-sdk/src/main/java/org/dromara/daxpay/sdk/util/PaySignUtil.java
index c15efcd9d..485bb8f4d 100644
--- a/daxpay-open-sdk/src/main/java/org/dromara/daxpay/sdk/util/PaySignUtil.java
+++ b/daxpay-open-sdk/src/main/java/org/dromara/daxpay/sdk/util/PaySignUtil.java
@@ -134,6 +134,7 @@ public class PaySignUtil {
         String s = content.toString();
         s = StrUtil.replace(s,"\\","");
         s = StrUtil.replace(s,"\"","");
+        s = s.toUpperCase();
         return s;
     }
 
diff --git a/daxpay-open/daxpay-open-core/src/main/java/org/dromara/daxpay/core/util/PaySignUtil.java b/daxpay-open/daxpay-open-core/src/main/java/org/dromara/daxpay/core/util/PaySignUtil.java
index 2b42c786e..d89909c1e 100644
--- a/daxpay-open/daxpay-open-core/src/main/java/org/dromara/daxpay/core/util/PaySignUtil.java
+++ b/daxpay-open/daxpay-open-core/src/main/java/org/dromara/daxpay/core/util/PaySignUtil.java
@@ -135,6 +135,7 @@ public class PaySignUtil {
         String s = content.toString();
         s = StrUtil.replace(s,"\\","");
         s = StrUtil.replace(s,"\"","");
+        s = s.toUpperCase();
         return s;
     }