diff --git a/src/views/documentTool/documentSplit/DocumentSplitDetail.vue b/src/views/documentTool/documentSplit/DocumentSplitDetail.vue
index b86384b..4538b60 100644
--- a/src/views/documentTool/documentSplit/DocumentSplitDetail.vue
+++ b/src/views/documentTool/documentSplit/DocumentSplitDetail.vue
@@ -406,9 +406,15 @@ export default {
       const targetId = info.node.eventKey
       // 序号，拖拽到节点里面，就把序号设置成最后一个节点的序号
       let displaySeq = info.node.dataRef.displaySeq
-      const children = info.node.dataRef.children || []
-      if (children && children.length) {
-        displaySeq = children[children.length - 1].displaySeq
+      let children = info.node.dataRef.children || []
+      // 递归拿到最内层的最后一个节点的序号
+      while (true) {
+        if (children && children.length) {
+          displaySeq = children[children.length - 1].displaySeq
+          children = children[children.length - 1].children || []
+        } else {
+          break
+        }
       }
       this.treeNodeSort({ sourceId, targetId, displaySeq })
     },
diff --git a/src/views/documentTool/documentSplit/modules/SplitTreeOrderModal.vue b/src/views/documentTool/documentSplit/modules/SplitTreeOrderModal.vue
index e42fc5a..2ad4f02 100644
--- a/src/views/documentTool/documentSplit/modules/SplitTreeOrderModal.vue
+++ b/src/views/documentTool/documentSplit/modules/SplitTreeOrderModal.vue
@@ -134,12 +134,19 @@ export default {
       const targetId = info.node.eventKey
       // 序号，拖拽到节点里面，就把序号设置成最后一个节点的序号
       let displaySeq = info.node.dataRef.displaySeq
-      const children = info.node.dataRef.children || []
-      if (children && children.length) {
-        displaySeq = children[children.length - 1].displaySeq
+      let children = info.node.dataRef.children || []
+      // 递归拿到最内层的最后一个节点的序号
+      while (true) {
+        if (children && children.length) {
+          displaySeq = children[children.length - 1].displaySeq
+          children = children[children.length - 1].children || []
+        } else {
+          break
+        }
       }
       this.treeNodeSort({ sourceId, targetId, displaySeq })
     },
+
     // 发请求
     treeNodeSort (params) {
       this.confirmLoading = true