diff --git a/app/controllers/student_works_controller.rb b/app/controllers/student_works_controller.rb
index dda677802..ad684952d 100644
--- a/app/controllers/student_works_controller.rb
+++ b/app/controllers/student_works_controller.rb
@@ -719,31 +719,35 @@ class StudentWorksController < ApplicationController
       tip_exception("参数错误，score和challenge_id不能为空")
     end
     challenge_setting = @homework.homework_challenge_settings.find_by(challenge_id: params[:challenge_id])
-    challenge = challenge_setting&.challenge
-    tip_exception("不能小于零") if params[:score].to_i < 0
-    tip_exception("不能大于关卡分值：#{challenge_setting.score}分") if challenge_setting && challenge_setting.score < params[:score].to_i
+    if challenge_setting
+      challenge = challenge_setting&.challenge
+      tip_exception("不能小于零") if params[:score].to_i < 0
+      tip_exception("不能大于关卡分值：#{challenge_setting.score}分") if challenge_setting && challenge_setting.score < params[:score].to_i
 
-    ActiveRecord::Base.transaction do
-      begin
-        if params[:type] == "review"
-          copy_user = User.find params[:copy_user_id]
-          comment = "代码查重结果显示与#{copy_user.try(:show_real_name)}的代码相似度#{params[:code_rate]}%"
-        else
-          comment = "根据实训报告中最终提交的代码调整第#{challenge.position}关分数"
-        end
-        challenge_score = @work.challenge_work_scores.create(challenge_id: params[:challenge_id], user_id: current_user.id, score: params[:score],
-                                           comment: comment)
-        challenge_score.create_tiding current_user.id
-        if @work.work_status != 0 && @work.myshixun
-          HomeworksService.new.update_myshixun_work_score @work, @work.myshixun, @work.myshixun&.games, @homework, @homework.homework_challenge_settings
-        else
-          update_none_commit_work @work, @homework
+      ActiveRecord::Base.transaction do
+        begin
+          if params[:type] == "review"
+            copy_user = User.find params[:copy_user_id]
+            comment = "代码查重结果显示与#{copy_user.try(:show_real_name)}的代码相似度#{params[:code_rate]}%"
+          else
+            comment = "根据实训报告中最终提交的代码调整第#{challenge.position}关分数"
+          end
+          challenge_score = @work.challenge_work_scores.create(challenge_id: params[:challenge_id], user_id: current_user.id, score: params[:score],
+                                                               comment: comment)
+          challenge_score.create_tiding current_user.id
+          if @work.work_status != 0 && @work.myshixun
+            HomeworksService.new.update_myshixun_work_score @work, @work.myshixun, @work.myshixun&.games, @homework, @homework.homework_challenge_settings
+          else
+            update_none_commit_work @work, @homework
+          end
+        rescue Exception => e
+          uid_logger(e.message)
+          tip_exception("调分失败")
+          raise ActiveRecord::Rollback
         end
-      rescue Exception => e
-        uid_logger(e.message)
-        tip_exception(e.message)
-        raise ActiveRecord::Rollback
       end
+    else
+      tip_exception("该关卡不记分")
     end
   end