diff --git a/src/pages/index/components/pests-chart.vue b/src/pages/index/components/pests-chart.vue
index f21e8ee..5ff4d83 100644
--- a/src/pages/index/components/pests-chart.vue
+++ b/src/pages/index/components/pests-chart.vue
@@ -230,9 +230,15 @@ export default {
           seriesData.push(resData[key])
         })
         const max = Math.max(...seriesData)
-        let maxN = Math.ceil(max / 5) * 5
-        maxN = maxN === 0 ? 5 : maxN
-        this.opts.yAxis.data[0].max = maxN
+
+        if (max > 5) {
+          let maxN = Math.ceil(max / 5) * 5
+          maxN = maxN === 0 ? 5 : maxN
+          this.opts.yAxis.data[0].max = maxN
+        } else {
+          this.opts.yAxis.splitNumber = max
+        }
+
         let res = {
           categories: xAxis,
           series: [