diff --git a/core/core-frontend/src/views/chart/components/editor/editor-style/components/LabelSelector.vue b/core/core-frontend/src/views/chart/components/editor/editor-style/components/LabelSelector.vue
index 599226dca5..993b5c3065 100644
--- a/core/core-frontend/src/views/chart/components/editor/editor-style/components/LabelSelector.vue
+++ b/core/core-frontend/src/views/chart/components/editor/editor-style/components/LabelSelector.vue
@@ -177,12 +177,7 @@ const changeLabelAttr = prop => {
 const init = () => {
   const chart = JSON.parse(JSON.stringify(props.chart))
   if (chart.customAttr) {
-    let customAttr = null
-    if (Object.prototype.toString.call(chart.customAttr) === '[object Object]') {
-      customAttr = JSON.parse(JSON.stringify(chart.customAttr))
-    } else {
-      customAttr = JSON.parse(chart.customAttr)
-    }
+    const customAttr = chart.customAttr
     if (customAttr.label) {
       state.labelForm = defaultsDeep(customAttr.label, cloneDeep(COMPUTED_DEFAULT_LABEL.value))
       if (chartType.value === 'liquid' && state.labelForm.fontSize < fontSizeList.value[0].value) {
diff --git a/core/core-frontend/src/views/chart/components/editor/util/chart.ts b/core/core-frontend/src/views/chart/components/editor/util/chart.ts
index e8a168dc59..e194499235 100644
--- a/core/core-frontend/src/views/chart/components/editor/util/chart.ts
+++ b/core/core-frontend/src/views/chart/components/editor/util/chart.ts
@@ -277,7 +277,7 @@ export const DEFAULT_LABEL: ChartLabelAttr = {
   show: false,
   position: 'top',
   color: '#909399',
-  fontSize: 10,
+  fontSize: 12,
   formatter: '',
   labelLine: {
     show: true