diff --git a/src/modules/treeTable.js b/src/modules/treeTable.js
index a404ab83..21ff2401 100644
--- a/src/modules/treeTable.js
+++ b/src/modules/treeTable.js
@@ -387,7 +387,8 @@ layui.define(['table'], function (exports) {
     layui.each(tableData, function (i1, item1) {
       var dataIndex = (parentIndex ? parentIndex + '-' : '') + i1;
       var dataNew = $.extend({}, item1);
-      dataNew[pIdKey] = item1[pIdKey] || parentId;
+      
+      dataNew[pIdKey] = typeof item1[pIdKey] !== 'undefined' ? item1[pIdKey] : parentId;
       flat.push(dataNew);
       flat = flat.concat(that.treeToFlat(item1[childrenKey], item1[customName.id], dataIndex));
     });