diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index 5a31d8e9a..44a2faa92 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -1290,18 +1290,17 @@ class ExercisesController < ApplicationController
     if params[:export].present? && params[:export]
       normal_status(0,"正在下载中")
     else
-      # file = File.open(Rails.root.join('exercise_export/blank_exercise.html.erb'))
-      # html = ERB.new(file.read).result(prepare_binding)
-      #
-      # kit = PDFKit.new(html)
-      # base_css = %w(app/templates/exercise_export/exercise_export.css)
-      # base_css.each { |css| kit.stylesheets << Rails.root.join(css) }
+      file = File.open(Rails.root.join('exercise_export/blank_exercise.html.erb'))
+      html = ERB.new(file.read)
+
+      kit = PDFKit.new(html)
+      base_css = %w(app/templates/exercise_export/exercise_export.css)
+      base_css.each { |css| kit.stylesheets << Rails.root.join(css) }
       # file = Tempfile.new(filename_)
       # kit.to_pdf(file.path)
       # file
-      #
-      # send_file file,disposition: 'inline', type:"pdf_attachment.content_type",stream:false
-      render pdf: 'exercise_export/blank_exercise',filename: filename_, stylesheets: stylesheets
+
+      send_file kit.to_pdf, filename: filename_ ,disposition: 'inline', type:"application/pdf"
 
       # set_export_cookies
       # render pdf: 'exercise_export/blank_exercise', filename: filename_, stylesheets: stylesheets, disposition: 'inline', type:"pdf_attachment.content_type",stream:false