diff --git a/app/common/service/StudentService.php b/app/common/service/StudentService.php
index 08e7026..3716099 100644
--- a/app/common/service/StudentService.php
+++ b/app/common/service/StudentService.php
@@ -101,13 +101,19 @@ class StudentService
             $code = $request->post('code');
             $user_info = WechatSubscriptController::getCodeAccessToken($code);
             if (isset($result['code'])) {
-                $message = '获取信息失败';
+                throw new Exception('获取信息失败');
             }
             $openid = $user_info['openid'];
-            $teacher = Student::where(['id'=>$request->student->id])->findOrEmpty();
-            $teacher->save([
-                'openid' => $openid,
-            ]);
+
+            $student = Student::where(['id'=>$request->student->id])->findOrEmpty();
+            if($student->openid && $student->openid != $openid){
+                throw new Exception('当前账号已绑定其它学生，不能重复绑定');
+            }else{
+                $student->save([
+                    'openid' => $openid,
+                ]);
+            }
+
 
             return [
                 'code' => ResponseCode::SUCCESS,
diff --git a/app/common/service/TeacherService.php b/app/common/service/TeacherService.php
index a06509a..57a2b1d 100644
--- a/app/common/service/TeacherService.php
+++ b/app/common/service/TeacherService.php
@@ -141,9 +141,13 @@ class TeacherService
             }
             $openid = $user_info['openid'];
             $teacher = Teacher::where(['id'=>$request->teacher->id])->findOrEmpty();
-            $teacher->save([
-                'openid' => $openid,
-            ]);
+            if($teacher->openid && $teacher->openid != $openid){
+                throw new Exception('当前账号已绑定其它教师，不能重复绑定');
+            }else{
+                $teacher->save([
+                    'openid' => $openid,
+                ]);
+            }
 
             return [
                 'code' => ResponseCode::SUCCESS,