diff --git a/pay-java-wx/src/main/java/com/egzosn/pay/wx/api/WxPayService.java b/pay-java-wx/src/main/java/com/egzosn/pay/wx/api/WxPayService.java
index 3deeb64..9b5fcee 100644
--- a/pay-java-wx/src/main/java/com/egzosn/pay/wx/api/WxPayService.java
+++ b/pay-java-wx/src/main/java/com/egzosn/pay/wx/api/WxPayService.java
@@ -535,7 +535,8 @@ public class WxPayService extends BasePayService {
         if (!StringUtils.isEmpty(order.getRemark())){
             parameters.put("desc", order.getRemark());
         }
-        parameters.put(SIGN, createSign(parameters, payConfigStorage.getInputCharset()));
+        parameters.put(SIGN, createSign(SignUtils.parameterText(parameters, "&", SIGN), payConfigStorage.getInputCharset()));
+
         return getHttpRequestTemplate().postForObject(getUrl(WxTransactionType.BANK),  XML.getMap2Xml(parameters), JSONObject.class);
     }
 
@@ -553,7 +554,7 @@ public class WxPayService extends BasePayService {
         parameters.put("mch_id", payConfigStorage.getPid());
         parameters.put("partner_trade_no", StringUtils.isEmpty(outNo) ? tradeNo : outNo);
         parameters.put("nonce_str", SignUtils.randomStr());
-        parameters.put(SIGN, createSign(parameters, payConfigStorage.getInputCharset()));
+        parameters.put(SIGN, createSign(SignUtils.parameterText(parameters, "&", SIGN), payConfigStorage.getInputCharset()));
         return getHttpRequestTemplate().postForObject(getUrl(WxTransactionType.QUERY_BANK),  XML.getMap2Xml(parameters), JSONObject.class);
     }