diff --git a/src/components/ChartTimeLineBar/index.vue b/src/components/ChartTimeLineBar/index.vue
index e97cf2f..1d1fbaa 100644
--- a/src/components/ChartTimeLineBar/index.vue
+++ b/src/components/ChartTimeLineBar/index.vue
@@ -178,11 +178,11 @@ export default {
               yAxis : [
                   {
                       max: function (value) {
-                        return (value.max + (value.max - value.min)  * 0.3).toFixed(2)
+                        return (value.max + (value.max - value.min==0?0.5:value.max - value.min)  * 0.3).toFixed(2)
                       },
                       min: function (value) {
                         if(type == 'line'){
-                          return (value.min - (value.max - value.min)  * 0.3).toFixed(2)
+                          return (value.min - (value.max - value.min==0?0.5:value.max - value.min)  * 0.3).toFixed(2)
                         }
                         return 0
                       },