diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index bb413608..b0417e5f 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -6817,68 +6817,70 @@ end
 
 # 用户评测时更新实训作业成绩
 def update_myshixun_work_score myshixun
-  student_works = myshixun.student_works
-  #logger.info("#############student_works_count: #{student_works.count}")
-  if student_works.count > 0
-    student_works.each do |work|
-      homework = work.homework_common
-      member = Member.find_by_sql("select course_group_id from members where course_id = #{homework.course_id} and user_id = #{User.current.id}").first
-      #logger.info("#############member_course_group_id: #{member.try(:course_group_id)}")
-      setting_time = homework_group_setting homework, member.try(:course_group_id)
-      if setting_time.end_time.present? && (setting_time.end_time > Time.now || (homework.allow_late && !homework.course.is_end))
-        #logger.info("#############setting_time: #{setting_time.end_time}")
-
-        user_total_score = 0
-        pass_consume_time = 0
-        final_score = 0
-        homework.homework_challenge_settings.each do |setting|
-          game = myshixun.games.where(:challenge_id => setting.challenge_id, :status => 2).first
-          unless game.nil?
-            pass_consume_time += (game.cost_time / 60.0).to_f
-            user_total_score += game.final_score.to_i < 0 ? 0 : game.challenge.score.to_i
-            adjust_score = work.challenge_work_scores.where(:challenge_id => setting.challenge_id).last
-            final_score += adjust_score.present? ? adjust_score.score : (homework.homework_detail_manual.answer_open_evaluation ? setting.score : (game.final_score >= 0 ? setting.score : 0))
+  ActiveRecord::Base.transaction do
+    student_works = myshixun.student_works
+    #logger.info("#############student_works_count: #{student_works.count}")
+    if student_works.count > 0
+      student_works.each do |work|
+        homework = work.homework_common
+        member = Member.find_by_sql("select course_group_id from members where course_id = #{homework.course_id} and user_id = #{User.current.id}").first
+        #logger.info("#############member_course_group_id: #{member.try(:course_group_id)}")
+        setting_time = homework_group_setting homework, member.try(:course_group_id)
+        if setting_time.end_time.present? && (setting_time.end_time > Time.now || (homework.allow_late && !homework.course.is_end))
+          #logger.info("#############setting_time: #{setting_time.end_time}")
+
+          user_total_score = 0
+          pass_consume_time = 0
+          final_score = 0
+          homework.homework_challenge_settings.each do |setting|
+            game = myshixun.games.where(:challenge_id => setting.challenge_id, :status => 2).first
+            unless game.nil?
+              pass_consume_time += (game.cost_time / 60.0).to_f
+              user_total_score += game.final_score.to_i < 0 ? 0 : game.challenge.score.to_i
+              adjust_score = work.challenge_work_scores.where(:challenge_id => setting.challenge_id).last
+              final_score += adjust_score.present? ? adjust_score.score : (homework.homework_detail_manual.answer_open_evaluation ? setting.score : (game.final_score >= 0 ? setting.score : 0))
+            end
+          end
+          if work.work_status == 0
+            is_complete = myshixun.is_complete? && (myshixun.done_time < setting_time.end_time)
+            work.work_status = setting_time.end_time > Time.now ? 1 : (is_complete ? 1 : 2)
+            work.late_penalty = setting_time.end_time > Time.now ? 0 : (is_complete ? 0 : homework.late_penalty)
+            work.commit_time = myshixun.created_at > setting_time.publish_time ? setting_time.publish_time : myshixun.created_at
+            work.myshixun_id = myshixun.id
           end
-        end
-        if work.work_status == 0
-          is_complete = myshixun.is_complete? && (myshixun.done_time < setting_time.end_time)
-          work.work_status = setting_time.end_time > Time.now ? 1 : (is_complete ? 1 : 2)
-          work.late_penalty = setting_time.end_time > Time.now ? 0 : (is_complete ? 0 : homework.late_penalty)
-          work.commit_time = myshixun.created_at > setting_time.publish_time ? setting_time.publish_time : myshixun.created_at
-          work.myshixun_id = myshixun.id
-        end
 
-        efficiency = (pass_consume_time == 0 ? 0 : Math.log((user_total_score / pass_consume_time.to_f) + 1.0))
-        work.efficiency = format("%.2f", efficiency)
-
-        games = myshixun.games.where(:challenge_id => homework.homework_challenge_settings.map(&:challenge_id))
-        myshixun_endtime = games.select{|game| game.status == 2}.size == games.size ? games.map(&:end_time).max : nil
-        if myshixun_endtime.present?
-          min_efficiency_changed = min_efficiency_changed.present? ? min_efficiency_changed : false
-          work.compelete_status = 1
-          work.cost_time = myshixun_endtime.to_i - setting_time.publish_time.to_i
-
-          # 计算作品的效率分（已完成才计算）
-          if homework.work_efficiency
-            # 如果作业的最大效率值有变更则更新所有作品的效率分
-            if homework.max_efficiency < work.efficiency
-              homework.max_efficiency = work.efficiency
-              homework.update_column("max_efficiency", homework.max_efficiency)
-              update_student_eff_score homework
+          efficiency = (pass_consume_time == 0 ? 0 : Math.log((user_total_score / pass_consume_time.to_f) + 1.0))
+          work.efficiency = format("%.2f", efficiency)
+
+          games = myshixun.games.where(:challenge_id => homework.homework_challenge_settings.map(&:challenge_id))
+          myshixun_endtime = games.select{|game| game.status == 2}.size == games.size ? games.map(&:end_time).max : nil
+          if myshixun_endtime.present?
+            min_efficiency_changed = min_efficiency_changed.present? ? min_efficiency_changed : false
+            work.compelete_status = 1
+            work.cost_time = myshixun_endtime.to_i - setting_time.publish_time.to_i
+
+            # 计算作品的效率分（已完成才计算）
+            if homework.work_efficiency
+              # 如果作业的最大效率值有变更则更新所有作品的效率分
+              if homework.max_efficiency < work.efficiency
+                homework.max_efficiency = work.efficiency
+                homework.update_column("max_efficiency", homework.max_efficiency)
+                update_student_eff_score homework
+              end
+              eff_score = homework.max_efficiency == 0 ? 0 : work.efficiency / homework.max_efficiency * homework.eff_score
+              work.eff_score = format("%.2f", eff_score)
             end
-            eff_score = homework.max_efficiency == 0 ? 0 : work.efficiency / homework.max_efficiency * homework.eff_score
-            work.eff_score = format("%.2f", eff_score)
           end
-        end
 
-        work.update_time = Time.now
+          work.update_time = Time.now
 
-        # 为迁移的数据做特殊处理， 若分数小于当前通关分数则不更新
-        work.final_score = final_score if work.final_score.nil? || final_score > work.final_score
-        score = work.final_score + work.eff_score - work.late_penalty
-        work.work_score = format("%.2f",(score < 0 ? 0 : score).to_f) unless work.ultimate_score
-        #logger.info("#############work_score: #{score}")
-        work.save!
+          # 为迁移的数据做特殊处理， 若分数小于当前通关分数则不更新
+          work.final_score = final_score if work.final_score.nil? || final_score > work.final_score
+          score = work.final_score + work.eff_score - work.late_penalty
+          work.work_score = format("%.2f",(score < 0 ? 0 : score).to_f) unless work.ultimate_score
+          #logger.info("#############work_score: #{score}")
+          work.save!
+        end
       end
     end
   end