diff --git a/app/model/User.php b/app/model/User.php
index 5a96dcd..5e1d877 100644
--- a/app/model/User.php
+++ b/app/model/User.php
@@ -37,7 +37,8 @@ class User extends Model
         // 密码加盐值后哈希存储
         $password = $this->generateHashedPassword($data['password'], $salt);
 
-        $User->save([
+        $lastId = User::withTrashed()->where('id','>=',1)->order('id desc')->value('id');
+        $save = [
             // 随机头像
             'avatar'    => rand_avatar(),
             'password'  => $password,
@@ -46,7 +47,12 @@ class User extends Model
             'aid'       => $data['aid'],
             'identity'  => $identity,
             'register_time' => date("Y-m-d H:i:s",time())
-        ]);
+        ];
+        if ($lastId) {
+            $rand = rand(2,50);
+            $save['id'] = $lastId + $rand;
+        }
+        $User->save($save);
 
         return $User->id;
     }