diff --git a/web/src/assets/images/workflow/unknown.svg b/web/src/assets/images/workflow/unknown.svg
new file mode 100644
index 00000000..4c8198dd
--- /dev/null
+++ b/web/src/assets/images/workflow/unknown.svg
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="24px" height="24px" viewBox="0 0 24 24" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>未知节点</title>
+    <g id="空间里层页面优化" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="应用管理-工作流-配置-结束" transform="translate(-81, -222)">
+            <g id="未知节点" transform="translate(81, 222)">
+                <rect id="矩形" fill="#4DA8FF" x="0" y="0" width="24" height="24" rx="8"></rect>
+                <g id="未知" transform="translate(4, 4)" stroke="#FFFFFF">
+                    <g id="编组-29" transform="translate(1.5, 1.5)">
+                        <g id="编组-32" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.2">
+                            <rect id="矩形" x="0" y="0" width="2.78571429" height="2.78571429" rx="0.5"></rect>
+                            <rect id="矩形备份-2" x="10.2142857" y="0" width="2.78571429" height="2.78571429" rx="0.5"></rect>
+                            <rect id="矩形" x="0" y="10.2142857" width="2.78571429" height="2.78571429" rx="0.5"></rect>
+                            <rect id="矩形备份-2" x="10.2142857" y="10.2142857" width="2.78571429" height="2.78571429" rx="0.5"></rect>
+                            <line x1="1.39285714" y1="2.78571429" x2="1.39285714" y2="10.2142857" id="路径-10"></line>
+                            <line x1="11.6071429" y1="2.78571429" x2="11.6071429" y2="10.2142857" id="路径-10"></line>
+                            <line x1="2.78571429" y1="1.39285714" x2="10.2142857" y2="1.39285714" id="路径-11"></line>
+                            <line x1="2.78571429" y1="11.6071429" x2="10.2218696" y2="11.6071429" id="路径-12"></line>
+                        </g>
+                        <path d="M6.52432916,9.87401948 C6.13772983,9.87401948 5.82432916,9.56061881 5.82432916,9.17401948 C5.82432916,8.78742016 6.13772983,8.47401948 6.52432916,8.47401948 C6.91092848,8.47401948 7.22432916,8.78742016 7.22432916,9.17401948 C7.22432916,9.56061881 6.91092848,9.87401948 6.52432916,9.87401948 Z M8.31902118,5.62806989 C8.07271219,6.00231919 7.78239354,6.33608471 7.45624872,6.61995827 C7.28497017,6.76209568 7.1395834,6.94091014 7.02820004,7.14642499 C6.96128207,7.37469384 6.93624197,7.61622669 6.95463661,7.85600603 L5.97147432,7.85600603 L5.97147432,7.55843743 C5.96278552,7.25062126 6.0177749,6.94479831 6.131988,6.66574207 C6.29645546,6.367538 6.50993979,6.10844775 6.7606742,5.90275181 C6.96315112,5.72946983 7.15324854,5.53812192 7.32917462,5.33051172 C7.42118807,5.19526753 7.47065705,5.02865038 7.46962638,4.85745421 C7.46993348,4.61851645 7.37673645,4.39189307 7.21546905,4.23943033 C7.02808491,4.06206133 6.7899692,3.96970505 6.54664986,3.98002011 C6.30313821,3.97665394 6.06636072,4.07119573 5.87783981,4.24706618 C5.68380967,4.4710619 5.55131388,4.75479898 5.49660839,5.06346565 C5.4631688,5.29236377 4.49338418,5.39154635 4.50003404,4.92612469 C4.52964278,4.40848145 4.74202371,3.92666766 5.08863079,3.59089435 C5.47706668,3.20376734 5.97741851,2.99447314 6.49314835,3.003393 C7.03166324,2.97113454 7.56128279,3.16980909 7.97792275,3.56037182 C8.31228969,3.88267896 8.5034992,4.35809104 8.49960592,4.85745421 C8.50560934,5.12879049 8.44291047,5.3963476 8.31902118,5.62806989 L8.31902118,5.62806989 Z" id="形状结合" stroke-width="0.2" fill="#FFFFFF" fill-rule="nonzero"></path>
+                    </g>
+                </g>
+            </g>
+        </g>
+    </g>
+</svg>
\ No newline at end of file
diff --git a/web/src/i18n/en.ts b/web/src/i18n/en.ts
index 9df6d018..fe38734d 100644
--- a/web/src/i18n/en.ts
+++ b/web/src/i18n/en.ts
@@ -1980,6 +1980,7 @@ Memory Bear: After the rebellion, regional warlordism intensified for several re
       evolutionAndGovernance: 'Evolution & Governance',
       self_optimization: 'Self Optimization',
       process_evolution: 'Process Evolution',
+      unknown: 'Unknown Node',
 
       clickToConfigure: 'Click to configure node parameters',
       nodeProperties: 'Node Properties',
diff --git a/web/src/i18n/zh.ts b/web/src/i18n/zh.ts
index 3fe37ea8..19ff6d53 100644
--- a/web/src/i18n/zh.ts
+++ b/web/src/i18n/zh.ts
@@ -1977,6 +1977,7 @@ export const zh = {
       evolutionAndGovernance: '演化与治理',
       self_optimization: '自我优化',
       process_evolution: '流程演化',
+      unknown: '未知节点',
 
       clickToConfigure: '点击配置节点参数',
       nodeProperties: '节点属性',
@@ -2164,6 +2165,9 @@ export const zh = {
           output_variables: '输出变量',
           refreshTip: '同步函数签名至代码',
         },
+        unknown: {
+          replaceNodeType: '替换节点'
+        },
         name: '键',
         type: '类型',
         value: '值',
@@ -2195,7 +2199,8 @@ export const zh = {
         iteration: '迭代',
         input_cycle_vars: '初始循环变量',
         output_cycle_vars: '最终循环变量',
-      }
+      },
+      sureReplace: '确认替换',
     },
     emotionEngine: {
       emotionEngineConfig: '情感引擎配置',
diff --git a/web/src/views/Workflow/components/Properties/index.tsx b/web/src/views/Workflow/components/Properties/index.tsx
index e96b1757..76fc9ad0 100644
--- a/web/src/views/Workflow/components/Properties/index.tsx
+++ b/web/src/views/Workflow/components/Properties/index.tsx
@@ -1,14 +1,14 @@
 /*
  * @Author: ZhaoYing 
  * @Date: 2026-02-03 15:39:59 
- * @Last Modified by: ZhaoYing
- * @Last Modified time: 2026-02-11 12:07:06
+ * @Last Modified by: ZhaoYing 
+ * @Last Modified time: 2026-03-02 17:06:41 
  */
 import { type FC, useEffect, useState, useMemo } from "react";
 import clsx from 'clsx'
 import { useTranslation } from 'react-i18next'
 import { Graph, Node } from '@antv/x6';
-import { Form, Input, Select, InputNumber, Switch, Divider, Space } from 'antd'
+import { Form, Input, Select, InputNumber, Switch, Divider, Space, Button } from 'antd'
 import { CaretDownOutlined, CaretRightOutlined } from '@ant-design/icons';
 
 import type { NodeConfig, NodeProperties, ChatVariable } from '../../types'
@@ -36,6 +36,7 @@ import Editor, { type LexicalEditorProps } from "../Editor";
 import RbSlider from './RbSlider'
 import JinjaRender from './JinjaRender'
 import CodeExecution from './CodeExecution'
+import { nodeLibrary } from '../../constant';
 
 /**
  * Props for Properties component
@@ -69,7 +70,8 @@ interface PropertiesProps {
 const Properties: FC<PropertiesProps> = ({
   selectedNode,
   graphRef,
-  chatVariables
+  chatVariables,
+  blankClick
 }) => {
   const { t } = useTranslation()
   const [form] = Form.useForm<NodeConfig>();
@@ -80,9 +82,8 @@ const Properties: FC<PropertiesProps> = ({
   useEffect(() => {
     if (selectedNode?.getData()?.id) {
       setOutputCollapsed(true)
-    } else {
-      form.resetFields()
     }
+    form.resetFields()
   }, [selectedNode?.getData()?.id])
 
   useEffect(() => {
@@ -94,7 +95,7 @@ const Properties: FC<PropertiesProps> = ({
           initialValue[key] = config[key].defaultValue
         }
       })
-
+      
       form.setFieldsValue({
         type,
         id: selectedNode.id,
@@ -380,6 +381,41 @@ const Properties: FC<PropertiesProps> = ({
     }
   }
   console.log('variableList', variableList, currentNodeVariables)
+  const handleSureReplace = () => {
+    const { replaceNode } = values;
+    const nodeLibraryConfig = [...nodeLibrary]
+          .flatMap(category => category.nodes)
+          .find(n => n.type === replaceNode)
+
+    if (replaceNode && nodeLibraryConfig) {
+      // Preserve existing config values when switching node types
+      const currentData = selectedNode?.data || {};
+      const currentConfig = currentData.config || {};
+      const newConfig = nodeLibraryConfig.config || {};
+      
+      // Merge configs: keep existing values for matching keys, add new keys from template
+      const mergedConfig: Record<string, any> = {};
+      Object.keys(newConfig).forEach(key => {
+        if (currentConfig[key] && currentConfig[key].defaultValue !== undefined) {
+          // Preserve existing value if it exists
+          mergedConfig[key] = {
+            ...newConfig[key],
+            defaultValue: currentConfig[key].defaultValue
+          };
+        } else {
+          // Use new config template
+          mergedConfig[key] = { ...newConfig[key] };
+        }
+      });
+
+      selectedNode?.setData({
+        ...currentData,
+        ...nodeLibraryConfig,
+        config: mergedConfig
+      })
+      blankClick()
+    }
+  }
 
   return (
     <div className={clsx("rb:w-75 rb:fixed rb:right-0 rb:top-16 rb:bottom-0 rb:p-3 rb:pb-6", styles.properties)}>
@@ -399,8 +435,27 @@ const Properties: FC<PropertiesProps> = ({
           <Form.Item name="id" label="ID">
             <Input disabled />
           </Form.Item>
-          
-          {selectedNode?.data?.type === 'http-request'
+          {selectedNode?.data?.type === 'unknown'
+            ? <>
+              <Form.Item name="replaceNode" label={t('workflow.config.unknown.replaceNodeType')}>
+                <Select
+                  options={nodeLibrary.map(category => ({
+                    label: t(`workflow.${category.category}`),
+                    options: category.nodes.filter(item => !['cycle-start', 'break'].includes(item.type)).map(node => ({
+                      label: <div className="rb:flex rb:items-center rb:gap-2 rb:flex-1">
+                        <img src={node.icon} className="rb:size-3.5" />
+                        <div className="rb:wrap-break-word rb:line-clamp-1">{t(`workflow.${node.type}`)}</div>
+                      </div>,
+                      value: node.type
+                    }))
+                  }))}
+                  placeholder={t('common.pleaseSelect')}
+                  allowClear
+                />
+              </Form.Item>
+              <Button type="primary" size="small" className="rb:text-[12px]!" onClick={handleSureReplace}>{t('workflow.sureReplace')}</Button>
+            </>
+            : selectedNode?.data?.type === 'http-request'
             ? <HttpRequest 
                 options={variableList} 
                 selectedNode={selectedNode}
diff --git a/web/src/views/Workflow/constant.ts b/web/src/views/Workflow/constant.ts
index 9c65174c..e7d2177a 100644
--- a/web/src/views/Workflow/constant.ts
+++ b/web/src/views/Workflow/constant.ts
@@ -47,6 +47,7 @@ import breakIcon from '@/assets/images/workflow/break.png'
 import assignerIcon from '@/assets/images/workflow/assigner.png'
 import memoryReadIcon from '@/assets/images/workflow/memory-read.png'
 import memoryWriteIcon from '@/assets/images/workflow/memory-write.png'
+import unknownIcon from '@/assets/images/workflow/unknown.svg'
 
 import { memoryConfigListUrl } from '@/api/memory'
 
@@ -524,6 +525,10 @@ export const nodeLibrary: NodeLibrary[] = [
   //   ]
   // },
 ];
+export const unknownNode = {
+  type: 'unknown',
+  icon: unknownIcon
+}
 
 export const nodeWidth = 240;
 /**
diff --git a/web/src/views/Workflow/hooks/useWorkflowGraph.ts b/web/src/views/Workflow/hooks/useWorkflowGraph.ts
index a50bb416..2d8d1939 100644
--- a/web/src/views/Workflow/hooks/useWorkflowGraph.ts
+++ b/web/src/views/Workflow/hooks/useWorkflowGraph.ts
@@ -12,7 +12,7 @@ import { Graph, Node, MiniMap, Snapline, Clipboard, Keyboard, type Edge } from '
 import { register } from '@antv/x6-react-shape';
 import type { PortMetadata } from '@antv/x6/lib/model/port';
 
-import { nodeRegisterLibrary, graphNodeLibrary, nodeLibrary, portMarkup, portAttrs, edgeAttrs, edge_color, edge_selected_color, portTextAttrs, defaultAbsolutePortGroups, nodeWidth } from '../constant';
+import { nodeRegisterLibrary, graphNodeLibrary, nodeLibrary, portMarkup, portAttrs, edgeAttrs, edge_color, edge_selected_color, portTextAttrs, defaultAbsolutePortGroups, nodeWidth, unknownNode } from '../constant';
 import type { WorkflowConfig, NodeProperties, ChatVariable } from '../types';
 import { getWorkflowConfig, saveWorkflowConfig } from '@/api/application'
 
@@ -128,7 +128,7 @@ export const useWorkflowGraph = ({
     if (nodes.length) {
       const nodeList = nodes.map(node => {
         const { id, type, name, position, config = {} } = node
-        let nodeLibraryConfig = [...nodeLibrary]
+        let nodeLibraryConfig = [...nodeLibrary, { nodes: [unknownNode] }]
           .flatMap(category => category.nodes)
           .find(n => n.type === type)
         nodeLibraryConfig = JSON.parse(JSON.stringify({ config: {}, ...nodeLibraryConfig })) as NodeProperties