diff --git a/app/views/layouts/_course_base_info.html.erb b/app/views/layouts/_course_base_info.html.erb
index 65c065672..7cd55b47b 100644
--- a/app/views/layouts/_course_base_info.html.erb
+++ b/app/views/layouts/_course_base_info.html.erb
@@ -84,4 +84,12 @@
       <div id="join_in_course_header"><%= join_in_course_header(@course, User.current) %></div>
   <% end %>
 </div>
-<div class="cl"></div>
\ No newline at end of file
+<div class="cl"></div>
+<% if is_teacher %>
+    <div class="invite_code_tip_box fontGrey2">
+      <em></em>
+      <span></span>
+      <p class="mt10 mb5">请将邀请码告诉学生和教辅</p>
+      <p class="mb10">他们可以主动加入班级</p>
+    </div>
+<% end %>
\ No newline at end of file
diff --git a/app/views/layouts/base_courses.html.erb b/app/views/layouts/base_courses.html.erb
index 572efcb07..2c72e3e2e 100644
--- a/app/views/layouts/base_courses.html.erb
+++ b/app/views/layouts/base_courses.html.erb
@@ -50,7 +50,7 @@
 </div>
 <div class="cl"></div>
 <div class="">
-  <div class="sy_class_infobox" id="project_info_<%=@course.id %>">
+  <div class="sy_class_infobox pr" id="project_info_<%=@course.id %>">
     <%=render :partial => 'layouts/course_base_info' %>
   </div>
 
diff --git a/public/stylesheets/css/public.css b/public/stylesheets/css/public.css
index 9565a9e26..1c2d1d0d9 100644
--- a/public/stylesheets/css/public.css
+++ b/public/stylesheets/css/public.css
@@ -1454,4 +1454,8 @@ a:hover.sy_btn_green{ background: #51a74f;}
 .resource_tip_box em {display:block; border-width:10px; position:absolute;top:35px; left:-20px; border-style:dashed solid dashed dashed; border-color:transparent #eaeaea transparent transparent; font-size:0; line-height:0;}
 .resource_tip_box span {display:block; border-width:10px; position:absolute;top:35px; left:-18px; border-style:dashed solid dashed dashed; border-color:transparent #fff transparent transparent; font-size:0; line-height:0;}
 
+/*邀请码提示框*/
+.invite_code_tip_box {position:absolute; padding:5px 10px; white-space:nowrap; background-color:#fff; right:-185px; top:50px; box-shadow:0px 2px 8px rgba(146, 153, 169, 0.5);}
+.invite_code_tip_box em {display:block; border-width:10px; position:absolute;top:26px; left:-20px; border-style:dashed solid dashed dashed; border-color:transparent #eaeaea transparent transparent; font-size:0; line-height:0;}
+.invite_code_tip_box span {display:block; border-width:10px; position:absolute;top:26px; left:-18px; border-style:dashed solid dashed dashed; border-color:transparent #fff transparent transparent; font-size:0; line-height:0;}