diff --git a/packages/ui/src/components/core/RefParameterItem.svelte b/packages/ui/src/components/core/RefParameterItem.svelte
index 8e4de427b0355237cbe9e34252734e50b9bd1006..c79069ea636af5823685d2ce02d08769c56d7308 100644
--- a/packages/ui/src/components/core/RefParameterItem.svelte
+++ b/packages/ui/src/components/core/RefParameterItem.svelte
@@ -5,6 +5,14 @@
     import { useNodesData, useSvelteFlow } from '@xyflow/svelte';
     import { type Parameter, parameterRefTypes } from '../utils/Consts';
     import { useRefOptions } from '../utils/useRefOptions';
+    // 添加生命周期函数
+    import { onMount } from 'svelte';
+    // 在组件挂载时检查并设置默认值
+    onMount(() => {
+        if (!param.refType) {
+            updateRefType({ value: 'ref' }); // 设置数据来源默认值
+        }
+    });
 
     const { parameter, index, dataKeyName }: {
         parameter: Parameter,
diff --git a/packages/ui/src/components/nodes/CodeNode.svelte b/packages/ui/src/components/nodes/CodeNode.svelte
index 80d3a0b7229ad1acc0fa26a57517d70aef9b6af9..3ae442e27690bdfb123e96eaa8833a4a70270c11 100644
--- a/packages/ui/src/components/nodes/CodeNode.svelte
+++ b/packages/ui/src/components/nodes/CodeNode.svelte
@@ -12,7 +12,18 @@
         data: NodeProps['data'],
         [key: string]: any
     } = $props();
-
+    // 添加生命周期函数
+    import { onMount } from 'svelte';
+    // 在组件挂载时检查并设置默认值
+    onMount(() => {
+        if (!data.engine) {
+            updateNodeData(currentNodeId, ()=>{
+                return {
+                    engine: 'qlexpress'
+                }
+            })
+        }
+    });
     const currentNodeId = getCurrentNodeId();
     const { addParameter } = useAddParameter();
 
diff --git a/packages/ui/src/components/nodes/HttpNode.svelte b/packages/ui/src/components/nodes/HttpNode.svelte
index 63e48f73d781fef259f0a51688ca275f73e5286e..0d0c59a4493ba2db6eb0b5239d4e45a16ef43d9c 100644
--- a/packages/ui/src/components/nodes/HttpNode.svelte
+++ b/packages/ui/src/components/nodes/HttpNode.svelte
@@ -13,6 +13,18 @@
         [key: string]: any
     } = $props();
 
+    // 添加生命周期函数
+    import { onMount } from 'svelte';
+    // 在组件挂载时检查并设置默认值
+    onMount(() => {
+        if (!data.method) {
+            updateNodeData(currentNodeId, ()=>{
+                return {
+                    method: 'get'
+                }
+            })
+        }
+    });
     const method = [
         {value: 'get', label: 'GET'},
         {value: 'post', label: 'POST'},