diff --git a/packages/dialog/src/component.vue b/packages/dialog/src/component.vue
index 4450dfd1b..5a0424d1b 100644
--- a/packages/dialog/src/component.vue
+++ b/packages/dialog/src/component.vue
@@ -197,7 +197,9 @@
         this.rendered = true;
         this.open();
         if (this.appendToBody) {
-          document.body.appendChild(this.$el);
+          this.$nextTick(()=>{
+            document.body.appendChild(this.$el);
+          });
         }
       }
     },