diff --git a/src/views/floodSys/floodYP/historyEventDetail.vue b/src/views/floodSys/floodYP/historyEventDetail.vue
index 627d5cd..ca32387 100644
--- a/src/views/floodSys/floodYP/historyEventDetail.vue
+++ b/src/views/floodSys/floodYP/historyEventDetail.vue
@@ -107,6 +107,7 @@
   });
   chartOption.option4.xAxis.data = xData;
   chartOption.option4.series[0].data = yData;
+  chartOption.option4.yAxis.max = Math.max(...yData);
   if (xData.length > 0) {
     chartOption.option4.graphic.invisible = true;
   } else {