diff --git a/esua-epdc/epdc-admin/epdc-admin-server/src/main/java/com/elink/esua/epdc/service/impl/SysUserServiceImpl.java b/esua-epdc/epdc-admin/epdc-admin-server/src/main/java/com/elink/esua/epdc/service/impl/SysUserServiceImpl.java
index 954de6d52..2952e9ba1 100644
--- a/esua-epdc/epdc-admin/epdc-admin-server/src/main/java/com/elink/esua/epdc/service/impl/SysUserServiceImpl.java
+++ b/esua-epdc/epdc-admin/epdc-admin-server/src/main/java/com/elink/esua/epdc/service/impl/SysUserServiceImpl.java
@@ -221,6 +221,16 @@ public class SysUserServiceImpl extends BaseServiceImpl<SysUserDao, SysUserEntit
 
     @Override
     public Result modifyOpenIdByUsername(SysUserOpenIdFormDTO sysUserOpenIdFormDto) {
+        // 查询当前openId是否绑定过账户
+        SysUserDTO userDto = this.getSysUserInfoByOpenId(sysUserOpenIdFormDto.getOpenId());
+        if (null != userDto) {
+            // 解绑旧帐户
+            SysUserEntity entity = new SysUserEntity();
+            entity.setId(userDto.getId());
+            entity.setOpenId("");
+            baseDao.updateById(entity);
+        }
+        // 绑定新账户
         baseDao.updateOpenIdByUsername(sysUserOpenIdFormDto);
 
         return new Result();
diff --git a/esua-epdc/epdc-auth/src/main/java/com/elink/esua/epdc/controller/AuthController.java b/esua-epdc/epdc-auth/src/main/java/com/elink/esua/epdc/controller/AuthController.java
index d1a598bff..15ed691b7 100644
--- a/esua-epdc/epdc-auth/src/main/java/com/elink/esua/epdc/controller/AuthController.java
+++ b/esua-epdc/epdc-auth/src/main/java/com/elink/esua/epdc/controller/AuthController.java
@@ -119,7 +119,7 @@ public class AuthController {
         ValidatorUtils.validateEntity(workUserLoginDto);
         Result<WorkUserAuthorizationDTO> result = authService.workLogin(workUserLoginDto.getUsername(), workUserLoginDto.getPassword());
         if (result.success()) {
-            // 更新用户openId
+            // 解绑上一次登录账户并绑定当前账户
             SysUserOpenIdFormDTO sysUserOpenIdFormDto = ConvertUtils.sourceToTarget(workUserLoginDto, SysUserOpenIdFormDTO.class);
             authService.modifyOpenId(sysUserOpenIdFormDto);
         }