diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java
index ecce6c62f6e95198409d4eee55f6cbf7c8040032..27fe2bfa27a423258ad22708cacce46a88159d59 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java
@@ -345,9 +345,10 @@ public abstract class BaseWxPayServiceImpl implements WxPayService {
         if (result.getSignType() != null) {
           // 如果解析的通知对象中signType有值，则使用它进行验签
           signType = result.getSignType();
-        } else if (this.getConfig().getSignType() != null) {
+        } else if (configMap.get(result.getMchId()).getSignType() != null) {
           // 如果配置中signType有值，则使用它进行验签
-          signType = this.getConfig().getSignType();
+          signType = configMap.get(result.getMchId()).getSignType();
+          this.switchover(result.getMchId());
         }
       }
 
@@ -430,6 +431,7 @@ public abstract class BaseWxPayServiceImpl implements WxPayService {
       WxPayRefundNotifyResult result;
       if (XmlConfig.fastMode) {
         result = BaseWxPayResult.fromXML(xmlData, WxPayRefundNotifyResult.class);
+        this.switchover(result.getMchId());
         result.decryptReqInfo(this.getConfig().getMchKey());
       } else {
         result = WxPayRefundNotifyResult.fromXML(xmlData, this.getConfig().getMchKey());
@@ -465,12 +467,13 @@ public abstract class BaseWxPayServiceImpl implements WxPayService {
   }
 
   @Override
-  public WxScanPayNotifyResult parseScanPayNotifyResult(String xmlData, String signType) throws WxPayException {
+  public WxScanPayNotifyResult parseScanPayNotifyResult(String xmlData, @Deprecated String signType) throws WxPayException {
     try {
       log.debug("扫码支付回调通知请求参数：{}", xmlData);
       WxScanPayNotifyResult result = BaseWxPayResult.fromXML(xmlData, WxScanPayNotifyResult.class);
+      this.switchover(result.getMchId());
       log.debug("扫码支付回调通知解析后的对象：{}", result);
-      result.checkResult(this, signType, false);
+      result.checkResult(this, this.getConfig().getSignType(), false);
       return result;
     } catch (WxPayException e) {
       throw e;
@@ -481,8 +484,8 @@ public abstract class BaseWxPayServiceImpl implements WxPayService {
 
   @Override
   public WxScanPayNotifyResult parseScanPayNotifyResult(String xmlData) throws WxPayException {
-    final String signType = this.getConfig().getSignType();
-    return this.parseScanPayNotifyResult(xmlData, signType);
+//    final String signType = this.getConfig().getSignType();
+    return this.parseScanPayNotifyResult(xmlData, null);
   }
 
   @Override