diff --git a/src/main/java/com/gunshi/project/xyt/service/StatisticsService.java b/src/main/java/com/gunshi/project/xyt/service/StatisticsService.java
index 5aaa9e9..d97b875 100644
--- a/src/main/java/com/gunshi/project/xyt/service/StatisticsService.java
+++ b/src/main/java/com/gunshi/project/xyt/service/StatisticsService.java
@@ -192,7 +192,9 @@ public class StatisticsService {
                     count++;
                 }
             }
-            vo.setRzAvg(rzD.divide(new BigDecimal(count), 2, RoundingMode.HALF_UP));
+            if(count > 0){
+                vo.setRzAvg(rzD.divide(new BigDecimal(count), 2, RoundingMode.HALF_UP));
+            }
         }
     }