diff --git a/src/components/FcDesigner.vue b/src/components/FcDesigner.vue
index 80befe737bd814492e65ca885f9b1d3cc96de28d..c94b142dc69ba31862d4cc398218d8c70eeb2bcc 100644
--- a/src/components/FcDesigner.vue
+++ b/src/components/FcDesigner.vue
@@ -992,6 +992,14 @@ export default defineComponent({
                     {language: 'xml'}
                 ).value
             },
+            closePreview() {
+                data.preview = {
+                    state: false,
+                    rule: [],
+                    option: {},
+                    api: {},
+                };
+            },
             copyCode() {
                 copyTextToClipboard(this.$refs.previewCode.innerText);
             },