diff --git a/public/javascripts/edu/base_edu.js b/public/javascripts/edu/base_edu.js
index ab9c69bbe..029b50d4b 100644
--- a/public/javascripts/edu/base_edu.js
+++ b/public/javascripts/edu/base_edu.js
@@ -548,8 +548,7 @@ function submit_new_student_work(type){
     if(type == 3){
         var min_num = parseInt($("#min_num_member").html());
         var max_num = parseInt($("#max_num_member").html());
-        if( max_num >= $("input[name='user_id[]']").length >= min_num){
-        } else{
+        if( max_num < $("input[name='user_id[]']").length || $("input[name='user_id[]']").length < min_num){
             result = false;
             notice_box("成员人数不符合要求");
         }