diff --git a/src/views/charts2/charts/dnsInsight/DnsTrafficLine.vue b/src/views/charts2/charts/dnsInsight/DnsTrafficLine.vue
index 51e593fc..1deb5469 100644
--- a/src/views/charts2/charts/dnsInsight/DnsTrafficLine.vue
+++ b/src/views/charts2/charts/dnsInsight/DnsTrafficLine.vue
@@ -516,6 +516,9 @@ export default {
   beforeUnmount () {
     clearTimeout(this.timer)
     window.removeEventListener('resize', this.resize)
+    this.myChart = null
+    this.chartOption = null
+    this.unitConvert = null
   }
 }
 </script>
diff --git a/src/views/charts2/charts/npm/NpmLine.vue b/src/views/charts2/charts/npm/NpmLine.vue
index d3f599f6..64abfd25 100644
--- a/src/views/charts2/charts/npm/NpmLine.vue
+++ b/src/views/charts2/charts/npm/NpmLine.vue
@@ -338,6 +338,7 @@ export default {
     clearTimeout(this.timer)
     window.removeEventListener('resize', this.resize)
     this.myChart = null
+    this.chartOption = null
   }
 }
 </script>
diff --git a/src/views/charts2/charts/npm/NpmTrafficLine.vue b/src/views/charts2/charts/npm/NpmTrafficLine.vue
index c5ea0f0b..a24fc11b 100644
--- a/src/views/charts2/charts/npm/NpmTrafficLine.vue
+++ b/src/views/charts2/charts/npm/NpmTrafficLine.vue
@@ -671,6 +671,8 @@ export default {
     clearTimeout(this.timer)
     window.removeEventListener('resize', this.resize)
     this.myChart = null
+    this.myChart = null
+    this.unitConvert = null
   }
 }
 </script>