diff --git a/app/views/courses/settings/_boards_setting.html.erb b/app/views/courses/settings/_boards_setting.html.erb
index 18bcb5c0e..21115ff6e 100644
--- a/app/views/courses/settings/_boards_setting.html.erb
+++ b/app/views/courses/settings/_boards_setting.html.erb
@@ -45,7 +45,7 @@
   <%= form_tag url_for(:controller => 'boards', :action => 'create', :course_id => @course.id, :board_id => board.id), :id=> 'add_board_form_subboard',:remote => true do %>
     <div class="ml15 mt10">
       <span class="fontGrey3 mb5 mr10">新增子栏目名称 :</span>
-      <input id="subfield_name" name="name" placeholder="请输入子栏目名称" class="orgAddSearch mb10" type="text">
+      <input id="subfield_name" name="name" placeholder="请输入子栏目名称" maxlength="30" class="orgAddSearch mb10" type="text">
       <span id="new_notice" class="undis ml10">名称不能为空</span>
     </div>
     <div class="mb10">