diff --git a/src/core/wrapper/layout.js b/src/core/wrapper/layout.js
index 0bde292a7..be6785057 100644
--- a/src/core/wrapper/layout.js
+++ b/src/core/wrapper/layout.js
@@ -447,7 +447,7 @@ BI.Layout = BI.inherit(BI.Widget, {
                 } else {   //  如果新节点在旧节点区间中存在就复用一下
                     var sameOldIndex = sameOldVnode[1];
                     updated = self.patchItem(sameOldVnode[0], newStartVnode, sameOldIndex, newStartIdx) || updated;
-                    children[sameOldVnode[0].key == null ? newStartIdx : sameOldVnode[0].key] = self._children[self._getChildName(newStartIdx)] = self._children[self._getChildName(sameOldIndex)];
+                    children[sameOldVnode[0].key == null ? newStartIdx : sameOldVnode[0].key] = self._children[self._getChildName(sameOldIndex)];
                     if (newStartIdx !== sameOldIndex) {
                         delete self._children[self._getChildName(sameOldIndex)];
                     }