diff --git a/jeepay-core/src/main/java/com/jeequan/jeepay/core/entity/MchApp.java b/jeepay-core/src/main/java/com/jeequan/jeepay/core/entity/MchApp.java
index 358c25f0286a7ae9e745ba66cc421e2b984daa03..02fb43e2bb246e0aacf70532af21507843ba7318 100644
--- a/jeepay-core/src/main/java/com/jeequan/jeepay/core/entity/MchApp.java
+++ b/jeepay-core/src/main/java/com/jeequan/jeepay/core/entity/MchApp.java
@@ -36,7 +36,7 @@ public class MchApp extends BaseModel {
     /**
      * 应用ID
      */
-    @TableId(value = "app_id", type = IdType.ASSIGN_UUID)
+    @TableId(value = "app_id", type = IdType.INPUT)
     private String appId;
 
     /**
diff --git a/jeepay-manager/src/main/java/com/jeequan/jeepay/mgr/ctrl/merchant/MchAppController.java b/jeepay-manager/src/main/java/com/jeequan/jeepay/mgr/ctrl/merchant/MchAppController.java
index 51865a105dc18323360fbb4921ae8bd195263177..8058bb479b59c635fc7fcc0e5525306b8fbd0ac6 100644
--- a/jeepay-manager/src/main/java/com/jeequan/jeepay/mgr/ctrl/merchant/MchAppController.java
+++ b/jeepay-manager/src/main/java/com/jeequan/jeepay/mgr/ctrl/merchant/MchAppController.java
@@ -15,6 +15,7 @@
  */
 package com.jeequan.jeepay.mgr.ctrl.merchant;
 
+import cn.hutool.core.util.IdUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.jeequan.jeepay.core.aop.MethodLog;
@@ -81,6 +82,7 @@ public class MchAppController extends CommonCtrl {
     @PostMapping
     public ApiRes add() {
         MchApp mchApp = getObject(MchApp.class);
+        mchApp.setAppId(IdUtil.objectId());
 
         if(mchInfoService.getById(mchApp.getMchNo()) == null) {
             return ApiRes.fail(ApiCodeEnum.SYS_OPERATION_FAIL_SELETE);
diff --git a/jeepay-merchant/src/main/java/com/jeequan/jeepay/mch/ctrl/merchant/MchAppController.java b/jeepay-merchant/src/main/java/com/jeequan/jeepay/mch/ctrl/merchant/MchAppController.java
index c655660978a89384827f95a534da636182b907c0..0e7db5889a329f8dcc29e504c14208ee3ad4cf66 100644
--- a/jeepay-merchant/src/main/java/com/jeequan/jeepay/mch/ctrl/merchant/MchAppController.java
+++ b/jeepay-merchant/src/main/java/com/jeequan/jeepay/mch/ctrl/merchant/MchAppController.java
@@ -15,6 +15,7 @@
  */
 package com.jeequan.jeepay.mch.ctrl.merchant;
 
+import cn.hutool.core.util.IdUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.jeequan.jeepay.core.aop.MethodLog;
@@ -77,6 +78,7 @@ public class MchAppController extends CommonCtrl {
     public ApiRes add() {
         MchApp mchApp = getObject(MchApp.class);
         mchApp.setMchNo(getCurrentMchNo());
+        mchApp.setAppId(IdUtil.objectId());
 
         boolean result = mchAppService.save(mchApp);
         if (!result) {
diff --git a/jeepay-service/src/main/java/com/jeequan/jeepay/service/impl/MchInfoService.java b/jeepay-service/src/main/java/com/jeequan/jeepay/service/impl/MchInfoService.java
index 0c1345ef5e212d3b1ead37302afb96421997e617..1b330fa6fcfeb0c9fe8f42d90838185ad1d3a44e 100644
--- a/jeepay-service/src/main/java/com/jeequan/jeepay/service/impl/MchInfoService.java
+++ b/jeepay-service/src/main/java/com/jeequan/jeepay/service/impl/MchInfoService.java
@@ -15,6 +15,9 @@
  */
 package com.jeequan.jeepay.service.impl;
 
+import cn.hutool.core.util.IdUtil;
+import cn.hutool.core.util.RandomUtil;
+import cn.hutool.core.util.StrUtil;
 import com.alibaba.fastjson.JSONObject;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.jeequan.jeepay.core.constants.ApiCodeEnum;
@@ -85,9 +88,24 @@ public class MchInfoService extends ServiceImpl<MchInfoMapper, MchInfo> {
         sysUser.setState(mchInfo.getState());
         sysUserService.addSysUser(sysUser, CS.SYS_TYPE.MCH);
 
+        // 插入商户默认应用
+        MchApp mchApp = new MchApp();
+        mchApp.setAppId(IdUtil.objectId());
+        mchApp.setMchNo(mchInfo.getMchNo());
+        mchApp.setAppName("默认应用");
+        mchApp.setAppSecret(RandomUtil.randomString(128));
+        mchApp.setState(CS.YES);
+        mchApp.setCreatedBy(sysUser.getRealname());
+        mchApp.setCreatedUid(sysUser.getSysUserId());
+        saveResult = mchAppService.save(mchApp);
+        if (!saveResult) throw new BizException(ApiCodeEnum.SYS_OPERATION_FAIL_CREATE);
+
         // 存入商户默认用户ID
-        mchInfo.setInitUserId(sysUser.getSysUserId());
-        updateById(mchInfo);
+        MchInfo updateRecord = new MchInfo();
+        updateRecord.setMchNo(mchInfo.getMchNo());
+        updateRecord.setInitUserId(sysUser.getSysUserId());
+        saveResult = updateById(updateRecord);
+        if (!saveResult) throw new BizException(ApiCodeEnum.SYS_OPERATION_FAIL_CREATE);
 
     }
 
@@ -118,23 +136,27 @@ public class MchInfoService extends ServiceImpl<MchInfoMapper, MchInfo> {
                     .eq(SysUser::getBelongInfoId, mchNo)
                     .eq(SysUser::getSysType, CS.SYS_TYPE.MCH)
             );
+
+            // 4.删除当前商户应用信息
+            mchAppService.removeByIds(appIdList);
+
             // 返回的用户id
             List<Long> userIdList = new ArrayList<>();
             if (userList.size() > 0) {
                 for (SysUser user:userList) {
                     userIdList.add(user.getSysUserId());
                 }
-                // 4.删除当前商户用户子用户信息
+                // 5.删除当前商户用户子用户信息
                 sysUserAuthService.remove(SysUserAuth.gw().in(SysUserAuth::getUserId, userIdList));
             }
 
-            // 5.删除当前商户的登录用户
+            // 6.删除当前商户的登录用户
             sysUserService.remove(SysUser.gw()
                     .eq(SysUser::getBelongInfoId, mchNo)
                     .eq(SysUser::getSysType, CS.SYS_TYPE.MCH)
             );
 
-            // 6.删除当前商户
+            // 7.删除当前商户
             boolean removeMchInfo = removeById(mchNo);
             if (!removeMchInfo) throw new BizException("删除当前商户失败");
             return userIdList;