diff --git a/app/views/subjects/_subject_list.html.erb b/app/views/subjects/_subject_list.html.erb
index d26724eb5..7d6660142 100644
--- a/app/views/subjects/_subject_list.html.erb
+++ b/app/views/subjects/_subject_list.html.erb
@@ -67,12 +67,11 @@
 
 <script>
   //之下六行代码是为了解决实训套件的套件数目不到两排而造成的翻页器离底部距离太远的问题
-  var L = $(".sub-con").length;
-  if($(".newContainer").height()>849) {
+  var L = $(".pre_sub-con").length;
+  //console.log(L);
+  if($(".newContainer").height()>849&&L < 5) {
       var H = $(".newContainer").height() - 849;
-      if (L < 5) {
-          $("#new_expand").css("margin-top", H + "px");
-      }
+      $("#new_expand").css("margin-top", H + "px");
   }
     var timer="";
     $(".pre_sub-con").hover(function(ev){