diff --git a/db/migrate/20190805010545_modify_ke_contents_for_markdown.rb b/db/migrate/20190805010545_modify_ke_contents_for_markdown.rb
index 67b57b215..4b66add63 100644
--- a/db/migrate/20190805010545_modify_ke_contents_for_markdown.rb
+++ b/db/migrate/20190805010545_modify_ke_contents_for_markdown.rb
@@ -14,13 +14,6 @@ class ModifyKeContentsForMarkdown < ActiveRecord::Migration[5.2]
     #   m.update_column(:content, content)
     # end
     #
-    # # 试卷的描述
-    # Exercise.find_each do |e|
-    #   exercise_description = ke_transform_to_md e.exercise_description
-    #   puts("#exercise_description: #{exercise_description}")
-    #   e.update_column(:exercise_description, exercise_description)
-    # end
-    #
     # # 试卷的标题
     # ExerciseQuestion.find_each do |eq|
     #   question_title = ke_transform_to_md eq.question_title