diff --git a/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/BaseNode.java b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/BaseNode.java
new file mode 100644
index 0000000..127a8ec
--- /dev/null
+++ b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/BaseNode.java
@@ -0,0 +1,16 @@
+package com.lanyuanxiaoyao.service.ai.web.flow;
+
+import com.yomahub.liteflow.core.NodeComponent;
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * @author lanyuanxiaoyao
+ * @version 20250625
+ */
+@Slf4j
+public abstract class BaseNode extends NodeComponent {
+  @Override
+  public void process() throws Exception {
+    log.info(getClass().getName());
+  }
+}
diff --git a/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/EndNode.java b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/EndNode.java
new file mode 100644
index 0000000..ef9cffa
--- /dev/null
+++ b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/EndNode.java
@@ -0,0 +1,12 @@
+package com.lanyuanxiaoyao.service.ai.web.flow;
+
+/**
+ * @author lanyuanxiaoyao
+ * @version 20250625
+ */
+public class EndNode extends BaseNode {
+  @Override
+  public void process() throws Exception {
+
+  }
+}
diff --git a/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/LiteFlowService.java b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/LiteFlowService.java
new file mode 100644
index 0000000..954ca45
--- /dev/null
+++ b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/LiteFlowService.java
@@ -0,0 +1,304 @@
+package com.lanyuanxiaoyao.service.ai.web.flow;
+
+import cn.hutool.core.util.StrUtil;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.eclipsecollections.EclipseCollectionsModule;
+import com.yomahub.liteflow.builder.LiteFlowNodeBuilder;
+import com.yomahub.liteflow.core.NodeComponent;
+import com.yomahub.liteflow.enums.NodeTypeEnum;
+import java.util.LinkedList;
+import java.util.Queue;
+import lombok.Data;
+import lombok.extern.slf4j.Slf4j;
+import org.eclipse.collections.api.factory.Lists;
+import org.eclipse.collections.api.factory.Maps;
+import org.eclipse.collections.api.list.ImmutableList;
+import org.eclipse.collections.api.list.MutableList;
+import org.eclipse.collections.api.map.ImmutableMap;
+
+/**
+ * @author lanyuanxiaoyao
+ * @version 20250625
+ */
+@Slf4j
+public class LiteFlowService {
+  public LiteFlowService() {
+    createNode("start-amis-node", NodeTypeEnum.COMMON, StartNode.class);
+    createNode("end-amis-node", NodeTypeEnum.COMMON, EndNode.class);
+    createNode("llm-amis-node", NodeTypeEnum.COMMON, LlmNode.class);
+  }
+
+  private static void createNode(String name, NodeTypeEnum type, Class<? extends NodeComponent> clazz) {
+    LiteFlowNodeBuilder.createNode()
+        .setId(name)
+        .setName(name)
+        .setType(type)
+        .setClazz(clazz)
+        .build();
+  }
+
+  public static void main(String[] args) throws JsonProcessingException {
+    ObjectMapper mapper = new ObjectMapper();
+    mapper.registerModule(new EclipseCollectionsModule());
+    mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+    // language=JSON
+    String source = """
+        {
+          "nodes": [
+            {
+              "id": "A",
+              "type": "start",
+              "position": {
+                "x": 8,
+                "y": 272
+              },
+              "data": {},
+              "measured": {
+                "width": 256,
+                "height": 75
+              },
+              "selected": false,
+              "dragging": false
+            },
+            {
+              "id": "F",
+              "type": "end",
+              "position": {
+                "x": 1439.5556937134281,
+                "y": 282.2797340760818
+              },
+              "data": {},
+              "measured": {
+                "width": 256,
+                "height": 75
+              },
+              "selected": false,
+              "dragging": false
+            },
+            {
+              "id": "C",
+              "type": "normal",
+              "position": {
+                "x": 902.6781018665707,
+                "y": 115.31234529524048
+              },
+              "data": {},
+              "measured": {
+                "width": 256,
+                "height": 75
+              },
+              "selected": false,
+              "dragging": false
+            },
+            {
+              "id": "B",
+              "type": "normal",
+              "position": {
+                "x": 338,
+                "y": 287
+              },
+              "data": {},
+              "measured": {
+                "width": 256,
+                "height": 75
+              },
+              "selected": false,
+              "dragging": false
+            },
+            {
+              "id": "E",
+              "type": "normal",
+              "position": {
+                "x": 1086.6322978498904,
+                "y": 371.3061114283591
+              },
+              "data": {},
+              "measured": {
+                "width": 256,
+                "height": 75
+              },
+              "selected": true,
+              "dragging": false
+            },
+            {
+              "id": "D",
+              "type": "normal",
+              "position": {
+                "x": 700.0944461714178,
+                "y": 369.84258971430364
+              },
+              "data": {},
+              "measured": {
+                "width": 256,
+                "height": 75
+              },
+              "selected": false,
+              "dragging": false
+            }
+          ],
+          "edges": [
+            {
+              "source": "A",
+              "target": "B",
+              "id": "xy-edge__A-B"
+            },
+            {
+              "source": "B",
+              "target": "C",
+              "id": "xy-edge__B-C"
+            },
+            {
+              "source": "C",
+              "target": "F",
+              "id": "xy-edge__C-F"
+            },
+            {
+              "source": "D",
+              "target": "E",
+              "id": "xy-edge__D-E"
+            },
+            {
+              "source": "B",
+              "target": "D",
+              "id": "xy-edge__B-D"
+            },
+            {
+              "source": "E",
+              "target": "F",
+              "id": "xy-edge__E-F"
+            }
+          ],
+          "data": {
+            "A": {
+              "inputs": {
+                "name": {
+                  "type": "text"
+                },
+                "description": {
+                  "type": "text",
+                  "description": "文件描述"
+                }
+              }
+            },
+            "C": {
+              "model": "qwen3",
+              "outputs": {
+                "text": {
+                  "type": "string"
+                }
+              },
+              "systemPrompt": "你是个沙雕"
+            },
+            "B": {
+              "count": 3,
+              "score": 0.75,
+              "knowledgeId": 3585368238960640,
+              "query": "hello world"
+            },
+            "E": {
+              "type": "python",
+              "content": "code='hello'\\nprint(code)"
+            },
+            "D": {
+              "model": "qwen3",
+              "outputs": {
+                "text": {
+                  "type": "string"
+                }
+              },
+              "systemPrompt": "你是个聪明人"
+            }
+          }
+        }
+        """;
+    FlowData root = mapper.readValue(StrUtil.trim(source), FlowData.class);
+    log.info("\n{}", buildEl(root.nodes, root.edges));
+  }
+
+  public static String buildEl(ImmutableList<FlowData.Node> nodes, ImmutableList<FlowData.Edge> edges) {
+    var nodeMap = nodes.toMap(FlowData.Node::getId, node -> node);
+    var adjacencyGraph = Maps.mutable.<String, MutableList<String>>empty();
+    var reverseAdjacencyGraph = Maps.mutable.<String, MutableList<String>>empty();
+    var inDegree = Maps.mutable.<String, Integer>empty();
+
+    nodes.forEach(node -> {
+      adjacencyGraph.put(node.getId(), Lists.mutable.empty());
+      reverseAdjacencyGraph.put(node.getId(), Lists.mutable.empty());
+      inDegree.put(node.getId(), 0);
+    });
+    edges.forEach(edge -> {
+      adjacencyGraph.get(edge.getSource()).add(edge.getTarget());
+      reverseAdjacencyGraph.get(edge.getTarget()).add(edge.getSource());
+      inDegree.put(edge.getTarget(), inDegree.get(edge.getTarget()) + 1);
+    });
+
+    Queue<String> queue = new LinkedList<>();
+    var topologicalSortedList = Lists.mutable.<String>empty();
+
+    inDegree.forEachKeyValue((id, count) -> {
+      if (count == 0) {
+        queue.offer(id);
+      }
+    });
+
+    while (!queue.isEmpty()) {
+      String id = queue.poll();
+      topologicalSortedList.add(id);
+      for (var neighborId : adjacencyGraph.get(id)) {
+        inDegree.put(neighborId, inDegree.get(neighborId) - 1);
+        if (inDegree.get(neighborId) == 0) {
+          queue.offer(neighborId);
+        }
+      }
+    }
+
+    topologicalSortedList.forEach(id -> log.info("{} {}", id, adjacencyGraph.get(id)));
+    topologicalSortedList.forEach(id -> log.info("{} {}", id, reverseAdjacencyGraph.get(id)));
+
+    var nodeQueue = new LinkedList<>(topologicalSortedList);
+    var chains = Lists.mutable.<MutableList<String>>empty();
+    while (!nodeQueue.isEmpty()) {
+      String currentId = nodeQueue.poll();
+      var subChain = Lists.mutable.<String>empty();
+      while (true) {
+        subChain.add(currentId);
+        nodeQueue.remove(currentId);
+        if (adjacencyGraph.get(currentId).size() != 1) {
+          break;
+        }
+        String nextId = adjacencyGraph.get(currentId).get(0);
+        if (reverseAdjacencyGraph.get(nextId).size() > 1) {
+          break;
+        }
+        currentId = nextId;
+      }
+      chains.add(subChain);
+    }
+
+    log.info("{}", chains);
+
+    return StrUtil.join(",", topologicalSortedList);
+  }
+
+  @Data
+  public static class FlowData {
+    private ImmutableList<Node> nodes;
+    private ImmutableList<Edge> edges;
+    private ImmutableMap<String, Object> data;
+
+    @Data
+    public static class Node {
+      private String id;
+      private String type;
+    }
+
+    @Data
+    public static class Edge {
+      private String id;
+      private String source;
+      private String target;
+    }
+  }
+}
diff --git a/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/LlmNode.java b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/LlmNode.java
new file mode 100644
index 0000000..4dc9d70
--- /dev/null
+++ b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/LlmNode.java
@@ -0,0 +1,12 @@
+package com.lanyuanxiaoyao.service.ai.web.flow;
+
+/**
+ * @author lanyuanxiaoyao
+ * @version 20250625
+ */
+public class LlmNode extends BaseNode {
+  @Override
+  public void process() throws Exception {
+
+  }
+}
diff --git a/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/StartNode.java b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/StartNode.java
new file mode 100644
index 0000000..4d1a34f
--- /dev/null
+++ b/service-ai/service-ai-web/src/test/java/com/lanyuanxiaoyao/service/ai/web/flow/StartNode.java
@@ -0,0 +1,12 @@
+package com.lanyuanxiaoyao.service.ai.web.flow;
+
+/**
+ * @author lanyuanxiaoyao
+ * @version 20250625
+ */
+public class StartNode extends BaseNode {
+  @Override
+  public void process() throws Exception {
+
+  }
+}
diff --git a/service-web/client/src/pages/ai/flow/FlowEditor.tsx b/service-web/client/src/pages/ai/flow/FlowEditor.tsx
index bbd6f33..4709fae 100644
--- a/service-web/client/src/pages/ai/flow/FlowEditor.tsx
+++ b/service-web/client/src/pages/ai/flow/FlowEditor.tsx
@@ -4,6 +4,7 @@ import {
   BackgroundVariant,
   type Connection,
   Controls,
+  getIncomers,
   getOutgoers,
   MiniMap,
   type Node,
@@ -17,11 +18,13 @@ import {arrToMap, find, findIdx, isEqual, isNil, randomId} from 'licia'
 import {type JSX, useState} from 'react'
 import styled from 'styled-components'
 import '@xyflow/react/dist/style.css'
+import Queue from 'yocto-queue'
 import {amisRender, commonInfo, horizontalFormOptions} from '../../../util/amis.tsx'
 import CodeNode from './node/CodeNode.tsx'
 import EndNode from './node/EndNode.tsx'
 import KnowledgeNode from './node/KnowledgeNode.tsx'
 import LlmNode from './node/LlmNode.tsx'
+import ParallelNode from './node/ParallelNode.tsx'
 import StartNode from './node/StartNode.tsx'
 import {useDataStore} from './store/DataStore.ts'
 import {useFlowStore} from './store/FlowStore.ts'
@@ -71,27 +74,32 @@ function FlowEditor() {
     component: (props: NodeProps) => JSX.Element
   }[]>([
     {
-      key: 'start-amis-node',
+      key: 'start-node',
       name: '开始',
       component: StartNode,
     },
     {
-      key: 'end-amis-node',
+      key: 'end-node',
       name: '结束',
       component: EndNode,
     },
     {
-      key: 'llm-amis-node',
+      key: 'parallel-node',
+      name: '并行',
+      component: ParallelNode,
+    },
+    {
+      key: 'llm-node',
       name: '大模型',
       component: LlmNode,
     },
     {
-      key: 'knowledge-amis-node',
+      key: 'knowledge-node',
       name: '知识库',
       component: KnowledgeNode,
     },
     {
-      key: 'code-amis-node',
+      key: 'code-node',
       name: '代码执行',
       component: CodeNode,
     },
@@ -183,10 +191,10 @@ function FlowEditor() {
   }
 
   const checkNode = (type: string) => {
-    if (isEqual(type, 'start-amis-node') && findIdx(nodes, (node: Node) => isEqual(type, node.type)) > -1) {
+    if (isEqual(type, 'start-node') && findIdx(nodes, (node: Node) => isEqual(type, node.type)) > -1) {
       throw new Error('只能存在1个开始节点')
     }
-    if (isEqual(type, 'end-amis-node') && findIdx(nodes, (node: Node) => isEqual(type, node.type)) > -1) {
+    if (isEqual(type, 'end-node') && findIdx(nodes, (node: Node) => isEqual(type, node.type)) > -1) {
       throw new Error('只能存在1个结束节点')
     }
   }
@@ -201,12 +209,12 @@ function FlowEditor() {
       throw new Error('连线目标节点未找到')
     }
     // 禁止短路整个流程
-    if (isEqual('start-amis-node', sourceNode.type) && isEqual('end-amis-node', targetNode.type)) {
+    if (isEqual('start-node', sourceNode.type) && isEqual('end-node', targetNode.type)) {
       throw new Error('开始节点不能直连结束节点')
     }
 
     // 禁止流程出现环，必须是有向无环图
-    const hasCycle = (node: Node, visited = new Set()) => {
+    const hasCycle = (node: Node, visited = new Set<string>()) => {
       if (visited.has(node.id)) return false
       visited.add(node.id)
       for (const outgoer of getOutgoers(node, nodes, edges)) {
@@ -219,11 +227,35 @@ function FlowEditor() {
     } else if (hasCycle(targetNode)) {
       throw new Error('禁止流程循环')
     }
+
+    const hasRedundant = (source: Node, target: Node) => {
+      const visited = new Set<string>()
+      const queue = new Queue<Node>()
+      queue.enqueue(source)
+      visited.add(source.id)
+      while (queue.size > 0) {
+        const current = queue.dequeue()!
+        console.log(current.id)
+        for (const incomer of getIncomers(current, nodes, edges)) {
+          if (isEqual(incomer.id, target.id)) {
+            return true
+          }
+          if (!visited.has(incomer.id)) {
+            visited.add(incomer.id)
+            queue.enqueue(incomer)
+          }
+        }
+      }
+      return false
+    }
+    if (hasRedundant(sourceNode, targetNode)) {
+      throw new Error('出现冗余边')
+    }
   }
 
   useMount(() => {
     // language=JSON
-    let initialData = JSON.parse('{\n  "nodes": [],\n  "edges": [],\n  "data": {}\n}')
+    let initialData = JSON.parse('{\n  "nodes": [\n    {\n      "id": "lurod0PM-J",\n      "type": "parallel-node",\n      "position": {\n        "x": -156,\n        "y": 77\n      },\n      "data": {},\n      "measured": {\n        "width": 256,\n        "height": 75\n      },\n      "selected": false,\n      "dragging": false\n    },\n    {\n      "id": "ldoKAzHnKF",\n      "type": "llm-node",\n      "position": {\n        "x": 207,\n        "y": -38\n      },\n      "data": {},\n      "measured": {\n        "width": 256,\n        "height": 75\n      },\n      "selected": false,\n      "dragging": false\n    },\n    {\n      "id": "1eJtMoJWs6",\n      "type": "llm-node",\n      "position": {\n        "x": 207,\n        "y": 172.5\n      },\n      "data": {},\n      "measured": {\n        "width": 256,\n        "height": 75\n      },\n      "selected": false,\n      "dragging": false\n    }\n  ],\n  "edges": [\n    {\n      "source": "lurod0PM-J",\n      "target": "1eJtMoJWs6",\n      "id": "xy-edge__lurod0PM-J-1eJtMoJWs6"\n    },\n    {\n      "source": "lurod0PM-J",\n      "target": "ldoKAzHnKF",\n      "id": "xy-edge__lurod0PM-J-ldoKAzHnKF"\n    }\n  ],\n  "data": {}\n}')
     let initialNodes = initialData['nodes'] ?? []
     let initialEdges = initialData['edges'] ?? []
 
diff --git a/service-web/client/src/pages/ai/flow/node/AmisNode.tsx b/service-web/client/src/pages/ai/flow/node/AmisNode.tsx
index 6616416..71662da 100644
--- a/service-web/client/src/pages/ai/flow/node/AmisNode.tsx
+++ b/service-web/client/src/pages/ai/flow/node/AmisNode.tsx
@@ -1,8 +1,8 @@
 import {DeleteFilled, EditFilled} from '@ant-design/icons'
-import {Handle, type NodeProps, Position} from '@xyflow/react'
+import {Handle, type HandleProps, type NodeProps, Position, useNodeConnections} from '@xyflow/react'
 import type {Schema} from 'amis'
 import {Card, Dropdown} from 'antd'
-import {isEmpty, isEqual} from 'licia'
+import {isEmpty, isEqual, isNil} from 'licia'
 import {type JSX} from 'react'
 import {horizontalFormOptions} from '../../../../util/amis.tsx'
 
@@ -55,13 +55,26 @@ export function outputsFormColumns(editable: boolean = false, required: boolean
   ]
 }
 
-interface AmisNodeProps {
-  nodeProps: NodeProps,
-  type: AmisNodeType,
-  defaultNodeName: String,
-  defaultNodeDescription?: String,
-  extraNodeDescription?: (nodeData: any) => JSX.Element,
-  columnSchema?: Schema[],
+export const LimitHandler = (props: HandleProps & { limit: number }) => {
+  const connections = useNodeConnections({
+    handleType: props.type,
+  })
+  return (
+    <Handle
+      {...props}
+      isConnectable={connections.length < props.limit}
+    />
+  )
+}
+
+type AmisNodeProps = {
+  nodeProps: NodeProps
+  type: AmisNodeType
+  defaultNodeName: String
+  defaultNodeDescription?: String
+  extraNodeDescription?: (nodeData: any) => JSX.Element
+  handlers?: (nodeData: any) => JSX.Element
+  columnSchema?: Schema[]
 }
 
 const AmisNode: (props: AmisNodeProps) => JSX.Element = ({
@@ -70,6 +83,7 @@ const AmisNode: (props: AmisNodeProps) => JSX.Element = ({
   defaultNodeName,
   defaultNodeDescription,
   extraNodeDescription,
+  handlers,
   columnSchema,
 }) => {
   const {id, data} = nodeProps
@@ -142,10 +156,14 @@ const AmisNode: (props: AmisNodeProps) => JSX.Element = ({
           </div>
         </Card>
       </Dropdown>
-      {isEqual(type, 'start') || isEqual(type, 'normal')
-        ? <Handle type="source" position={Position.Right}/> : undefined}
-      {isEqual(type, 'end') || isEqual(type, 'normal')
-        ? <Handle type="target" position={Position.Left}/> : undefined}
+      {isNil(handlers)
+        ? <>
+          {isEqual(type, 'start') || isEqual(type, 'normal')
+            ? <LimitHandler type="source" position={Position.Right} limit={1}/> : undefined}
+          {isEqual(type, 'end') || isEqual(type, 'normal')
+            ? <Handle type="target" position={Position.Left}/> : undefined}
+        </>
+        : handlers?.(nodeData)}
     </div>
   )
 }
diff --git a/service-web/client/src/pages/ai/flow/node/ParallelNode.tsx b/service-web/client/src/pages/ai/flow/node/ParallelNode.tsx
new file mode 100644
index 0000000..955100d
--- /dev/null
+++ b/service-web/client/src/pages/ai/flow/node/ParallelNode.tsx
@@ -0,0 +1,19 @@
+import {Handle, type NodeProps, Position} from '@xyflow/react'
+import AmisNode, {LimitHandler} from './AmisNode.tsx'
+
+const ParallelNode = (props: NodeProps) => AmisNode({
+  nodeProps: props,
+  type: 'normal',
+  defaultNodeName: '并行节点',
+  defaultNodeDescription: '允许开启并行流程',
+  handlers: () => {
+    return (
+      <>
+        <Handle type="source" position={Position.Right}/>
+        <LimitHandler type="target" position={Position.Left} limit={1}/>
+      </>
+    )
+  },
+})
+
+export default ParallelNode
\ No newline at end of file