diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index 5c3503718..6572e079d 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -64,7 +64,7 @@ class AttachmentsController < ApplicationController
     # modify by nwb
     # 下载添加权限设置
      candown = false
-    if (@attachment.container.has_attribute?(:project) || @attachment.container.has_attribute?(:project_id)) && @attachment.container.project
+    if @attachment.container.class.to_s != "HomeworkAttach" &&(@attachment.container.has_attribute?(:project) || @attachment.container.has_attribute?(:project_id)) && @attachment.container.project
       project = @attachment.container.project
       candown= User.current.member_of?(project) || (project.is_public && @attachment.is_public == 1)
     elsif  @attachment.container.is_a?(Project)
@@ -89,7 +89,6 @@ class AttachmentsController < ApplicationController
     elsif  @attachment.container_type == "Bid" && @attachment.container && @attachment.container.courses
       candown = User.current.member_of_course?(@attachment.container.courses.first) || (course.is_public == 1 && @attachment.is_public == 1)
     else
-
       candown = @attachment.is_public == 1
     end
     if candown || User.current.admin? || User.current.id == @attachment.author_id