diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index 07ab97cb5..a6c74818c 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -11,8 +11,6 @@ class AttachmentsController < ApplicationController
   def show
     # 1. 优先跳到cdn
     # 2. 如果没有cdn，send_file
-    # candown = attachment_candown @file
-    # tip_exception(403,"您没有权限下载该附件") if !candown
     if @file.cloud_url.present?
       update_downloads(@file)
       redirect_to @file.cloud_url and return
@@ -185,7 +183,7 @@ class AttachmentsController < ApplicationController
           course = @file.container&.graduation_work&.graduation_task&.course
           candown = current_user.member_of_course?(course)
         end
-        tip_exception(409, "您没有权限进入") if course.present? && !candown
+        tip_exception(403, "您没有权限进入") if course.present? && !candown
       end
     end
   end