diff --git a/simple-mind-map/src/constants/defaultOptions.js b/simple-mind-map/src/constants/defaultOptions.js
index cb45e926..782cb4c0 100644
--- a/simple-mind-map/src/constants/defaultOptions.js
+++ b/simple-mind-map/src/constants/defaultOptions.js
@@ -358,6 +358,8 @@ export const defaultOpt = {
   },
   // 是否允许调整关联线两个端点的位置
   enableAdjustAssociativeLinePoints: true,
+  // 关联线连接即将完成时执行，如果要阻止本次连接可以返回true，函数接收一个参数：node（目标节点实例）
+  beforeAssociativeLineConnection: null,
 
   // 【TouchEvent插件】
   // 禁止双指缩放，你仍旧可以使用api进行缩放
diff --git a/simple-mind-map/src/plugins/AssociativeLine.js b/simple-mind-map/src/plugins/AssociativeLine.js
index a65ec273..27694200 100644
--- a/simple-mind-map/src/plugins/AssociativeLine.js
+++ b/simple-mind-map/src/plugins/AssociativeLine.js
@@ -446,6 +446,12 @@ class AssociativeLine {
   // 完成创建连接线
   completeCreateLine(node) {
     if (this.creatingStartNode.uid === node.uid) return
+    const { beforeAssociativeLineConnection } = this.mindMap.opt
+    let stop = false
+    if (typeof beforeAssociativeLineConnection === 'function') {
+      stop = beforeAssociativeLineConnection(node)
+    }
+    if (stop) return
     this.addLine(this.creatingStartNode, node)
     if (this.overlapNode && this.overlapNode.getData('isActive')) {
       this.mindMap.execCommand('SET_NODE_ACTIVE', this.overlapNode, false)