diff --git a/application/api/model/UserData.php b/application/api/model/UserData.php
index 5dc24ac..7f34e8b 100644
--- a/application/api/model/UserData.php
+++ b/application/api/model/UserData.php
@@ -254,6 +254,11 @@ class UserData extends Model
     //修改手机号
     public function modify_mobile($new_mobile,$user_id)
     {
+        //查询新手机号绑定的数量
+        $new_mobile_num = db::name('user')->where(['username' => $new_mobile,'status' => ['neq', 0]])->count();
+        if ($new_mobile_num >= 3) {
+            return ['code' => 0, 'msg' => '该手机号已达绑定上限','data' =>null];
+        }
         //查询旧手机号
         $mobile = db::name('user')->where(['id' => $user_id])->value('username');
         //查询是否实名