diff --git a/YD_Event.Application/Judge/JudgeScoringController.cs b/YD_Event.Application/Judge/JudgeScoringController.cs
index 8c106a9..74af7c5 100644
--- a/YD_Event.Application/Judge/JudgeScoringController.cs
+++ b/YD_Event.Application/Judge/JudgeScoringController.cs
@@ -1273,7 +1273,8 @@ public class JudgeScoringController : IDynamicApiController
     private static JudgeScorePreviewDto ToPreviewDto(ScoreSheetCalculationResult calculation, ScoreRuleConfig config) =>
         new()
         {
-            DifficultyScore = calculation.DifficultyScore,
+            // 裁判端的难度小计按规则精度展示，内部仍保留原始值参与最终汇总。
+            DifficultyScore = config.Round(calculation.DifficultyScore),
             PerformanceScore = calculation.PerformanceScore,
             RequiredScore = calculation.RequiredScore,
             DeductionScore = calculation.DeductionScore,