diff --git a/ui/src/workflow/index.vue b/ui/src/workflow/index.vue
index 0860b5cc5..6ae4aba82 100644
--- a/ui/src/workflow/index.vue
+++ b/ui/src/workflow/index.vue
@@ -557,7 +557,7 @@ const validate = () => {
   return Promise.all(lf.value.graphModel.nodes.map((element: any) => element?.validate?.()))
 }
 const getGraphData = () => {
-  return JSON.stringify(lf.value.getGraphData())
+  return lf.value.getGraphData()
 }
 
 const onmousedown = (shapeItem: ShapeItem) => {