diff --git a/examples/routers/tree.vue b/examples/routers/tree.vue
index 98fc8f74..b053f222 100644
--- a/examples/routers/tree.vue
+++ b/examples/routers/tree.vue
@@ -29,7 +29,8 @@
                             },
                             {
                                 title: 'child2',
-                                id: '1-2'
+                                id: '1-2',
+                                children: []
                             }
                         ]
                     }
diff --git a/src/components/tree/tree.vue b/src/components/tree/tree.vue
index f6b5e222..51134175 100644
--- a/src/components/tree/tree.vue
+++ b/src/components/tree/tree.vue
@@ -71,7 +71,7 @@
                 // init checked status
                 function reverseChecked(data) {
                     if (!data.nodeKey) data.nodeKey = key++;
-                    if (data.children) {
+                    if (data.children && data.children.length) {
                         let checkedLength = 0;
                         data.children.forEach(node => {
                             if (node.children) node = reverseChecked(node);