diff --git a/app/models/game.rb b/app/models/game.rb
index ae056a702..d81b794a5 100644
--- a/app/models/game.rb
+++ b/app/models/game.rb
@@ -31,7 +31,7 @@ class Game < ApplicationRecord
 
   # 根据得分比例来算实际得分(试卷、实训作业)
   def real_score score
-    (final_score.to_f / challenge.all_score) * score
+    ((final_score < 0 ? 0 : final_score).to_f / challenge.all_score) * score
   end
 
   # 判断实训是否全部通关