diff --git a/app/controllers/poll_controller.rb b/app/controllers/poll_controller.rb
index 1b2794034..b897d039a 100644
--- a/app/controllers/poll_controller.rb
+++ b/app/controllers/poll_controller.rb
@@ -23,6 +23,10 @@ class PollController < ApplicationController
 
   def show
     @poll = Poll.find params[:id]
+    if @poll.polls_status != 2 && !User.current.allowed_to?(:as_teacher,@course)
+      render_403
+      return
+    end
     #已提交问卷的用户不能再访问该界面
     if has_commit_poll?(@poll.id,User.current.id) && (!User.current.admin?)
       render_403