diff --git a/app/views/challenges/_form.html.erb b/app/views/challenges/_form.html.erb
index c63fe9766..d3d631c1a 100644
--- a/app/views/challenges/_form.html.erb
+++ b/app/views/challenges/_form.html.erb
@@ -119,14 +119,14 @@
     <div class="fl task-bd-grey">
       <% if params[:action] == "edit" && @challenge_tags.count > 0 %>
           <% @challenge_tags.each do |tag| %>
-              <div class="task-tag tag-grey mb10 mr10 fl">
+              <div class="task-tag tag-grey mt5 mr10 fl">
                 <button data-dismiss="alert" class="close fr mt3 ml5" type="button" onclick="close_tag(this)">×</button>
                 <input class='knowledge_frame' name='knowledge[input][]' value="<%= tag.try(:name)%>" />
               </div>
           <% end %>
       <% end %>
-      <button class="close fl mt3 mr10" type="button" onclick="$('#add_shixun_skill').slideToggle();" id="add_knowledge">+</button>
-      <div class="task-tag tag-grey mb10 mr10 fl undis" id="add_shixun_skill">
+      <button class="close fl mt8 mr10" type="button" onclick="$('#add_shixun_skill').slideToggle();" id="add_knowledge">+</button>
+      <div class="task-tag tag-grey mt5 mr10 fl undis" id="add_shixun_skill">
         <button data-dismiss="alert" class="close fr mt3 ml5" type="button" onclick="$('#add_shixun_skill').slideToggle();">×</button>
         <input type="text" class="task-tag-input" onblur="add_tag();" placeholder="请输入知识/技能点" />
       </div>
@@ -200,7 +200,7 @@
         var val = $(".task-tag-input").val().trim();
         if (val != ""){
             testLength = $(".task-tag-input").val().trim().length;
-            $("#add_knowledge").before("<div class='task-tag tag-grey mb10 mr10 fl' id='knowledge_" + num + "'>" +
+            $("#add_knowledge").before("<div class='task-tag tag-grey mt5 mr10 fl' id='knowledge_" + num + "'>" +
                     "<button data-dismiss='alert' class='close fr mt3 ml5' type='button' onclick='close_tag(this)'>×</button>" +
                     "<input style='width:"+ testLength*12 +"px' class='knowledge_frame' name='knowledge[input][]' value='" + val +"'>" +
                     " </div>");