diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index e3c524fa..428e1157 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -893,6 +893,8 @@ class AttachmentsController < ApplicationController
       @subject = @attachment.container
     elsif @attachment.container_type == 'School'
       @school = @attachment.container
+    elsif @attachment.container_type == 'Library'
+      @library = @attachment.container
     else
       unless @attachment.container_type == 'Syllabus' || @attachment.container_type == 'Bid' ||  @attachment.container_type == 'Organization' || @attachment.container_type == 'HomeworkAttach' || @attachment.container_type == 'Memo' || @attachment.container_type == 'Softapplication' || @attachment.container_type == 'PhoneAppVersion' || @attachment.container_type == 'StudentWorksScore' || @attachment.container_type == 'StudentWork' || @attachment.container_type == 'Work'|| @attachment.container_type == 'ContestantWork'|| @attachment.container_type == 'Contest' || @attachment.container_type == 'HomeworkBank' || @attachment.container_type == 'Exercise' || @attachment.container_type == 'ExerciseBank' ||  @attachment.container_type == 'Career' ||  @attachment.container_type == 'EcTemplate'
         @project = @attachment.project
diff --git a/app/controllers/libraries_controller.rb b/app/controllers/libraries_controller.rb
index 8d1eeb06..c124c191 100644
--- a/app/controllers/libraries_controller.rb
+++ b/app/controllers/libraries_controller.rb
@@ -22,7 +22,7 @@ class LibrariesController < ApplicationController
 
   def show
     @library = Library.find(params[:id])
-    return redirect_to libraries_path unless admin_or_self?
+    return render_403 unless admin_or_self? || @library.published?
 
     @library_applies = @library.library_applies.where(status: :refused).order('created_at desc')
     @library.increment_visited_count!
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 74ecd8c4..031c4399 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -4368,6 +4368,8 @@ module ApplicationHelper
       elsif  attachment.container_type == "Bid" && attachment.container && attachment.container.courses
         course = attachment.container.courses.first
         candown = User.current.member_of_course?(attachment.container.courses.first) || (course.is_public == 1 && attachment.is_public == 1)
+      elsif attachment.container_type == "Library" #文库允许下载
+        candown = true
       else
         candown = (attachment.is_public == 1 || attachment.is_public == true)
       end