diff --git a/app/services/examination_banks/send_to_course_service.rb b/app/services/examination_banks/send_to_course_service.rb
index bb30e1992..012aa282b 100644
--- a/app/services/examination_banks/send_to_course_service.rb
+++ b/app/services/examination_banks/send_to_course_service.rb
@@ -10,6 +10,7 @@ class ExaminationBanks::SendToCourseService < ApplicationService
     ActiveRecord::Base.transaction do
       exercise.exercise_name = exam.name
       exercise.time = exam.duration.present? ? exam.duration : -1
+      exercise.is_md = false
       exercise.save!
 
       exam.examination_items.each_with_index do |item, index|
@@ -18,7 +19,6 @@ class ExaminationBanks::SendToCourseService < ApplicationService
         question.question_title = item.name
         question.question_number = index + 1
         question.question_score = item.score
-        question.is_md = false
 
         if item.item_type == "PROGRAM"
           new_hack = item.container.fork
diff --git a/app/views/exercise_questions/_exercise_questions.json.jbuilder b/app/views/exercise_questions/_exercise_questions.json.jbuilder
index 8359dbe98..043dede07 100644
--- a/app/views/exercise_questions/_exercise_questions.json.jbuilder
+++ b/app/views/exercise_questions/_exercise_questions.json.jbuilder
@@ -1,5 +1,4 @@
 json.question_id question.id
-json.is_md question.is_md
 q_positon = question.question_number
 if ques_position.present?
   q_positon = ques_position
diff --git a/app/views/exercises/_user_exercise_info.json.jbuilder b/app/views/exercises/_user_exercise_info.json.jbuilder
index c351a9b26..3e2e356ec 100644
--- a/app/views/exercises/_user_exercise_info.json.jbuilder
+++ b/app/views/exercises/_user_exercise_info.json.jbuilder
@@ -1,5 +1,5 @@
 json.exercise do
-  json.extract! exercise, :id, :exercise_name,:exercise_description,:exercise_status,:answer_open
+  json.extract! exercise, :id, :exercise_name,:exercise_description,:exercise_status,:answer_open,:is_md
   json.student_commit_status student_status   #当前为学生且已提交时
 end
 
diff --git a/app/views/exercises/edit.json.jbuilder b/app/views/exercises/edit.json.jbuilder
index 980e6735a..1c8f1cf71 100644
--- a/app/views/exercises/edit.json.jbuilder
+++ b/app/views/exercises/edit.json.jbuilder
@@ -3,7 +3,7 @@ json.left_banner_name @left_banner_name
 json.partial! "commons/success"
 
 json.exercise do
-  json.extract! @exercise, :id, :exercise_name,:exercise_description,:exercise_status
+  json.extract! @exercise, :id, :exercise_name,:exercise_description,:exercise_status,:is_md
 end
 
 json.partial! "exercises/exercise_scores"
diff --git a/app/views/exercises/show.json.jbuilder b/app/views/exercises/show.json.jbuilder
index afd15e8e7..bc06dc638 100644
--- a/app/views/exercises/show.json.jbuilder
+++ b/app/views/exercises/show.json.jbuilder
@@ -1,7 +1,7 @@
 json.partial! "commons/success"
 
 json.exercise do
-  json.extract! @exercise, :id, :exercise_name,:exercise_description,:exercise_status
+  json.extract! @exercise, :id, :exercise_name,:exercise_description,:exercise_status,:is_md
 end
 
 json.user_permission do
diff --git a/app/views/exercises/start_answer.json.jbuilder b/app/views/exercises/start_answer.json.jbuilder
index 01b730c76..26c5f38fd 100644
--- a/app/views/exercises/start_answer.json.jbuilder
+++ b/app/views/exercises/start_answer.json.jbuilder
@@ -2,7 +2,7 @@ all_question_status = []
 json.left_banner_id @left_banner_id
 json.left_banner_name @left_banner_name
 json.exercise do
-  json.extract! @exercise,:id,:exercise_name,:exercise_description
+  json.extract! @exercise,:id,:exercise_name,:exercise_description,:is_md
   json.exercise_status @t_user_exercise_status
   json.left_time @user_left_time
   json.user_exercise_status @user_exercise_status #当前用户的状态
diff --git a/db/migrate/20200326022655_add_is_md_to_exercise.rb b/db/migrate/20200326022655_add_is_md_to_exercise.rb
new file mode 100644
index 000000000..09fd71a1a
--- /dev/null
+++ b/db/migrate/20200326022655_add_is_md_to_exercise.rb
@@ -0,0 +1,6 @@
+class AddIsMdToExercise < ActiveRecord::Migration[5.2]
+  def change
+    remove_column :exercise_questions, :is_md
+    add_column :exercises, :is_md, :boolean, default: 1
+  end
+end