diff --git a/db/migrate/20190823023738_change_exericse_1936_scores.rb b/db/migrate/20190823023738_change_exericse_1936_scores.rb
new file mode 100644
index 000000000..202909276
--- /dev/null
+++ b/db/migrate/20190823023738_change_exericse_1936_scores.rb
@@ -0,0 +1,18 @@
+class ChangeExericse1936Scores < ActiveRecord::Migration[5.2]
+  def change
+    #1936的试卷成绩有问题。
+    # #https://www.educoder.net/courses/2935/exercises/1936/users/pizfnr5ts
+    ex_special = Exercise.find_by_id(1936)
+    ex_special_users = ex_special.exercise_users.exercise_user_committed.where("end_at is not null and end_at > ?",Time.now - 2.months)
+    if ex_special.present? && ex_special_users.exists?
+      ex_special_users.each do |ex_user|
+        calculate_score = calculate_student_score(ex_special,ex_user.user)[:total_score]
+        subjective_score = ex_user.subjective_score
+        total_score_subjective_score = subjective_score < 0.0 ? 0.0 : subjective_score
+        total_score = calculate_score + total_score_subjective_score
+        ex_user.update_attributes(score:total_score,objective_score:calculate_score)
+        puts ex_user.id
+      end
+    end
+  end
+end