diff --git a/ht/src/main/java/com/ccsens/ht/service/QuestionService.java b/ht/src/main/java/com/ccsens/ht/service/QuestionService.java
index 0321d818..8df7dbba 100644
--- a/ht/src/main/java/com/ccsens/ht/service/QuestionService.java
+++ b/ht/src/main/java/com/ccsens/ht/service/QuestionService.java
@@ -874,7 +874,9 @@ public class QuestionService implements IQuestionService {
         parameter.setQuickNums(nums.quickNums);
         parameter.setSlowNums(lineParameterList.size() - nums.quickNums);
         //平均绘图速度
-        parameter.setAveSpeed(BigDecimal.valueOf(totalLength / parameter.getTotalDuration()).setScale(2, RoundingMode.HALF_UP).doubleValue());
+        if(paintTime != 0){
+            parameter.setAveSpeed(BigDecimal.valueOf(totalLength / paintTime).setScale(3, RoundingMode.HALF_UP).doubleValue());
+        }
         return parameter;
     }