diff --git a/src/case/ztree/1.asynctree.js b/src/case/ztree/1.asynctree.js
index 21ed1c161..9bff9ee63 100644
--- a/src/case/ztree/1.asynctree.js
+++ b/src/case/ztree/1.asynctree.js
@@ -219,7 +219,7 @@ BI.AsyncTree = BI.inherit(BI.TreeView, {
 
     _getJoinValue: function () {
         if (!this.nodes) {
-            return {};
+            return this.options.paras.selectedValues || {};
         }
         var checkedValues = this._getSelectedValues();
         if (BI.isEmpty(checkedValues)) {