diff --git a/flossom-modules/flossom-system/src/main/java/com/flossom/system/service/impl/WxUserInstrumentServiceImpl.java b/flossom-modules/flossom-system/src/main/java/com/flossom/system/service/impl/WxUserInstrumentServiceImpl.java
index 8faf06d..d16d0b3 100644
--- a/flossom-modules/flossom-system/src/main/java/com/flossom/system/service/impl/WxUserInstrumentServiceImpl.java
+++ b/flossom-modules/flossom-system/src/main/java/com/flossom/system/service/impl/WxUserInstrumentServiceImpl.java
@@ -9,11 +9,13 @@ import com.flossom.common.core.domain.req.WxUserInstrumentExportVm;
 import com.flossom.common.core.enums.BindingStatusEnums;
 import com.flossom.common.core.mapper.*;
 import com.flossom.common.core.utils.DateUtils;
+import com.flossom.common.security.utils.SecurityUtils;
 import org.apache.commons.compress.utils.Lists;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import com.flossom.system.service.IWxUserInstrumentService;
+import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.CollectionUtils;
 
 /**
@@ -164,14 +166,15 @@ public class WxUserInstrumentServiceImpl implements IWxUserInstrumentService
     }
 
     @Override
+    @Transactional
     public Map<String,String> changeSerial(WxUserInstrument wxUserInstrument) {
         Map<String,String> resultMap = Maps.newHashMap();
         // 查询序列号是否有效存在
         WxInstrumentSerial serial = new WxInstrumentSerial();
         serial.setSerial(wxUserInstrument.getSerial());
         serial.setValidStatus(1); // 有效
-        List<WxInstrumentSerial> serialList = instrumentSerialMapper.selectWxInstrumentSerialList(serial);
-        if (CollectionUtils.isEmpty(serialList)) {
+        WxInstrumentSerial wxInstrumentSerial = instrumentSerialMapper.selectEntityListBySerial(serial);
+        if (wxInstrumentSerial == null) {
             resultMap.put("message","序列号无效,请确定后再绑定");
             resultMap.put("code", "500");
             return resultMap;
@@ -179,15 +182,16 @@ public class WxUserInstrumentServiceImpl implements IWxUserInstrumentService
         // 查看是否已经被绑定
         WxUserInstrument userInstrument = new WxUserInstrument();
         userInstrument.setSerial(wxUserInstrument.getSerial());
-        List<WxUserInstrument> wxUserInstrumentsList = wxUserInstrumentMapper.selectWxUserInstrumentList(userInstrument);
-        if (!CollectionUtils.isEmpty(wxUserInstrumentsList)) {
+        userInstrument.setBindingStatus(BindingStatusEnums.BINDED.getCode());
+        Integer count = wxUserInstrumentMapper.selectUiByInstrumentId(userInstrument);
+        if (count != null && count > 0) {
             resultMap.put("message","该序列号已经被绑定");
             resultMap.put("code", "500");
             return resultMap;
         }
         // 开始绑定
         WxUserInstrument userInstrumentRecord = wxUserInstrumentMapper.selectWxUserInstrumentById(wxUserInstrument.getId());
-
+        String oldSerial = userInstrumentRecord.getSerial();
         // 操作变更日记
         // 是否已经绑定
         if (0 == userInstrumentRecord.getBindingStatus()) {
@@ -208,7 +212,7 @@ public class WxUserInstrumentServiceImpl implements IWxUserInstrumentService
             }
         }
         // 更新信息
-        WxInstrumentSerial instrumentSerialVo = serialList.get(0);
+        WxInstrumentSerial instrumentSerialVo = wxInstrumentSerial;
         userInstrumentRecord.setInstrumentId(instrumentSerialVo.getInstrumentId());
         userInstrumentRecord.setSerial(instrumentSerialVo.getSerial());
 //        userInstrumentRecord.setSerialImage(userInstrument.getSerialImage());
@@ -216,6 +220,24 @@ public class WxUserInstrumentServiceImpl implements IWxUserInstrumentService
         this.saveLog(userInstrumentRecord,0);
 
         // 更新绑定数据
+        WxInstrumentSerial oldUpdate = new WxInstrumentSerial();
+        oldUpdate.setBindingStatus(BindingStatusEnums.UN_BOUND.getCode());
+        oldUpdate.setUpdateBy(SecurityUtils.getUsername());
+        oldUpdate.setUpdateTime(DateUtils.getNowDate());
+        oldUpdate.setSerial(oldSerial);
+        instrumentSerialMapper.updateBySerial(oldUpdate);
+
+
+        WxInstrumentSerial newUpdate = new WxInstrumentSerial();
+        newUpdate.setBindingStatus(BindingStatusEnums.BINDED.getCode());
+        newUpdate.setUpdateBy(SecurityUtils.getUsername());
+        newUpdate.setUpdateTime(DateUtils.getNowDate());
+        newUpdate.setSerial(wxUserInstrument.getSerial());
+        instrumentSerialMapper.updateBySerial(newUpdate);
+
+        userInstrumentRecord.setUserId(null);
+        userInstrumentRecord.setInstrumentId(null);
+        userInstrumentRecord.setBindingStatus(BindingStatusEnums.BINDED.getCode());
         wxUserInstrumentMapper.updateWxUserInstrument(userInstrumentRecord);
         resultMap.put("message","换绑序列号成功");
         resultMap.put("code", "200");