diff --git a/app/controllers/homework_commons_controller.rb b/app/controllers/homework_commons_controller.rb
index 4cd9209f3..57ae1023b 100644
--- a/app/controllers/homework_commons_controller.rb
+++ b/app/controllers/homework_commons_controller.rb
@@ -250,7 +250,7 @@ class HomeworkCommonsController < ApplicationController
       challenge_settings = @homework.homework_challenge_settings
       myshixuns.find_each(batch_size: 100) do |myshixun|
         work = student_works.select{|work| work.user_id == myshixun.user_id}.first
-        if work && myshixun && (work.update_time.nil? || work.update_time < myshixun.updated_at)
+        if work && myshixun && (work.update_time.nil? || work.update_time < myshixun.games.pluck(:updated_at).max)
           games = myshixun.games.where(challenge_id: challenge_settings.pluck(:challenge_id))
           HomeworksService.new.update_myshixun_work_score work, myshixun, games, @homework, challenge_settings
         end
@@ -271,7 +271,7 @@ class HomeworkCommonsController < ApplicationController
     myshixun = Myshixun.find_by(shixun_id: params[:shixun_id], user_id: current_user.id)
     ActiveRecord::Base.transaction do
       begin
-        if work && myshixun && (work.update_time.nil? || work.update_time < myshixun.updated_at)
+        if work && myshixun && (work.update_time.nil? || work.update_time < myshixun.games.pluck(:updated_at).max)
           challenge_settings = @homework.homework_challenge_settings
           games = myshixun.games.where(challenge_id: challenge_settings.pluck(:challenge_id))
           HomeworksService.new.update_myshixun_work_score work, myshixun, games, @homework, challenge_settings