diff --git a/src/hook/render/layout.js b/src/hook/render/layout.js
index 5d1e814..f395646 100644
--- a/src/hook/render/layout.js
+++ b/src/hook/render/layout.js
@@ -3,6 +3,7 @@
  */
 
 import { globalLookup } from "../global";
+import { pinkLog } from "../utils";
 import { Cell, dotConnect, ModuleView } from "./yosys";
 
 // 线段的宽度
@@ -199,9 +200,12 @@ export class Module {
      */
     makeConnectionElkNodes() {
         const nodes = [];
+
+        // 完成去重
+        const id2EdgeCount = new Map();
         const edges = [];
 
-        const tree = this.view
+        const tree = this.view;
 
         for (const cellName of tree.nameToCell.keys()) {
             const cell = tree.nameToCell.get(cellName);
@@ -281,25 +285,40 @@ export class Module {
                             // 器件当前的口为 input，那么所连接的 port 就必须是 input，即便这个 port 是 output
                             
                             if (connection.direction === 'input') {
-                                const edge = {
-                                    // id 遵循 sourcePort-targetPort
-                                    id: makeEdgeId(port.id, connection.id),
-                                    source: port.id,
-                                    sourcePort: dotConnect(port.id, '0'),
-                                    target: cell.id,
-                                    targetPort: connection.id
-                                };
-                                
-                                edges.push(edge);
+                                const edgeId = makeEdgeId(port.id, connection.id);
+                                if (!id2EdgeCount.has(edgeId)) {
+                                    id2EdgeCount.set(edgeId, 0);
+
+                                    const edge = {
+                                        // id 遵循 sourcePort-targetPort
+                                        id: edgeId,
+                                        source: port.id,
+                                        sourcePort: dotConnect(port.id, '0'),
+                                        target: cell.id,
+                                        targetPort: connection.id
+                                    };
+                                    edges.push(edge);
+                                }
+                                const counter = id2EdgeCount.get(edgeId);
+                                id2EdgeCount.set(edgeId, counter + 1);
+
                             } else {
-                                const edge = {
-                                    id: makeEdgeId(connection.id, port.id),
-                                    source: cell.id,
-                                    sourcePort: connection.id,
-                                    target: port.id,
-                                    targetPort: dotConnect(port.id, '0')
-                                };    
-                                edges.push(edge);
+                                const edgeId = makeEdgeId(connection.id, port.id);
+                                if (!id2EdgeCount.has(edgeId)) {
+                                    id2EdgeCount.set(edgeId, 0);
+                                    const edge = {
+                                        id: edgeId,
+                                        source: cell.id,
+                                        sourcePort: connection.id,
+                                        target: port.id,
+                                        targetPort: dotConnect(port.id, '0')
+                                    };    
+                                    edges.push(edge);
+                                }
+
+                                const counter = id2EdgeCount.get(edgeId);
+                                id2EdgeCount.set(edgeId, counter + 1);
+
                             }
                         } else if (tree.wireIdToConnection.has(wireId)) {
                             
@@ -312,25 +331,39 @@ export class Module {
                             }
 
                             if (conn.direction === 'input') {
-                                const edge = {
-                                    // id 遵循 sourcePort-targetPort
-                                    id: makeEdgeId(conn.id, connection.id),
-                                    source: cell.id,
-                                    sourcePort: connection.id,
-                                    target: conn.cell.id,
-                                    targetPort: conn.id
-                                };
-    
-                                edges.push(edge);
+                                const edgeId = makeEdgeId(conn.id, connection.id);
+                                if (!id2EdgeCount.has(edgeId)) {
+                                    id2EdgeCount.set(edgeId, 0);
+                                    const edge = {
+                                        // id 遵循 sourcePort-targetPort
+                                        id: edgeId,
+                                        source: cell.id,
+                                        sourcePort: connection.id,
+                                        target: conn.cell.id,
+                                        targetPort: conn.id
+                                    };
+                                    edges.push(edge);
+                                }
+
+                                const counter = id2EdgeCount.get(edgeId);
+                                id2EdgeCount.set(edgeId, counter + 1);
+
                             } else {
-                                const edge = {
-                                    id: makeEdgeId(connection.id, conn.id),
-                                    source: conn.cell.id,
-                                    sourcePort: conn.id,
-                                    target: cell.id,
-                                    targetPort: connection.id
-                                };
-                                edges.push(edge);
+                                const edgeId = makeEdgeId(connection.id, conn.id);
+                                if (!id2EdgeCount.has(edgeId)) {
+                                    id2EdgeCount.set(edgeId, 0);
+                                    const edge = {
+                                        id: edgeId,
+                                        source: conn.cell.id,
+                                        sourcePort: conn.id,
+                                        target: cell.id,
+                                        targetPort: connection.id
+                                    };
+                                    edges.push(edge);
+                                }
+
+                                const counter = id2EdgeCount.get(edgeId);
+                                id2EdgeCount.set(edgeId, counter + 1);
                             }
                         }
                     }
@@ -339,6 +372,9 @@ export class Module {
             }
         }
 
+        pinkLog('#edge: ' + edges.length);
+        this.id2EdgeCount = id2EdgeCount;
+        
         return [nodes, edges];
     }