diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 291e68d77..b18d0c706 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -2349,22 +2349,25 @@ module ApplicationHelper
 
   #根据传入作业确定显示为编辑作品还是新建作品,或者显示作品数量
   def user_for_homework_common homework,is_teacher
-    if is_teacher #老师显示作品数量
-      link_to "提交(#{homework.student_works.count})",student_work_index_path(:homework => homework.id),:class => "c_blue"
-    else #学生显示提交作品、修改作品等按钮
-      work = cur_user_works_for_homework homework
-      if work.nil?
-        link_to "提交作品",  new_student_work_path(:homework => homework.id),:class => 'c_blue'
-      else
-        if homework.homework_detail_manual && homework.homework_detail_manual.comment_status != 1 #匿评作业，且作业状态不是在开启匿评之前
-          link_to "作品匿评", student_work_index_path(:homework => homework.id), :class => 'c_blue', :title => "开启匿评后不可修改作品"
-        elsif homework.homework_type == 2 #编程作业不能修改作品
-          link_to "修改作品",  new_student_work_path(:homework => homework.id),:class => 'c_blue'
+    if User.current.member_of_course?(homework.course)
+      if is_teacher #老师显示作品数量
+        link_to "提交(#{homework.student_works.count})",student_work_index_path(:homework => homework.id),:class => "c_blue"
+      else #学生显示提交作品、修改作品等按钮
+        work = cur_user_works_for_homework homework
+        if work.nil?
+          link_to "提交作品",  new_student_work_path(:homework => homework.id),:class => 'c_blue'
         else
-          link_to "修改作品",  edit_student_work_path(work.id),:class => 'c_blue'
+          if homework.homework_detail_manual && homework.homework_detail_manual.comment_status != 1 #匿评作业，且作业状态不是在开启匿评之前
+            link_to "作品匿评", student_work_index_path(:homework => homework.id), :class => 'c_blue', :title => "开启匿评后不可修改作品"
+          elsif homework.homework_type == 2 #编程作业不能修改作品
+            link_to "修改作品",  new_student_work_path(:homework => homework.id),:class => 'c_blue'
+          else
+            link_to "修改作品",  edit_student_work_path(work.id),:class => 'c_blue'
+          end
         end
       end
     end
+
   end
 
   def student_anonymous_comment homework
diff --git a/app/views/users/_course_homework.html.erb b/app/views/users/_course_homework.html.erb
index 868f952fa..703a52c32 100644
--- a/app/views/users/_course_homework.html.erb
+++ b/app/views/users/_course_homework.html.erb
@@ -24,10 +24,12 @@
           <span class="grey_btn_cir ml10">匿评已结束</span>
       <% end%>
       <div class="homepagePostSubmitContainer">
-        <div class="homepagePostSubmit">
-          <% is_teacher = User.current.allowed_to?(:as_teacher,activity.course) %>
-          <%= user_for_homework_common activity,is_teacher %>
-        </div>
+        <% if User.current.member_of_course?(activity.course) %>
+            <div class="homepagePostSubmit">
+              <% is_teacher = User.current.allowed_to?(:as_teacher,activity.course) %>
+              <%= user_for_homework_common activity,is_teacher %>
+            </div>
+        <% end %>
 
         <% if activity.homework_type == 2 && is_teacher%>
             <div class="homepagePostSubmit">