diff --git a/examples/docs/en-US/tree.md b/examples/docs/en-US/tree.md
index 868bdc6c0..8b5569296 100644
--- a/examples/docs/en-US/tree.md
+++ b/examples/docs/en-US/tree.md
@@ -938,7 +938,7 @@ Only one node among the same level can be expanded at one time.
 | node-key              | unique identity key name for nodes, its value should be unique across the whole tree | string                      | —               | —       |
 | props                 | configuration options, see the following table | object                      | —               | —       |
 | render-after-expand   | whether to render child nodes only after a parent node is expanded for the first time | boolean | — | true |
-| load                  | method for loading subtree data          | function(node, resolve)     | —               | —       |
+| load                  | method for loading subtree data, lazy prop must be true  | function(node, resolve)     | —               | —       |
 | render-content        | render function for tree node            | Function(h, { node, data, store }        | —               | —       |
 | highlight-current     | whether current node is highlighted      | boolean                     | —               | false   |
 | default-expand-all    | whether to expand all nodes by default   | boolean                     | —               | false   |
@@ -951,6 +951,7 @@ Only one node among the same level can be expanded at one time.
 | filter-node-method    | this function will be executed on each node when use filter method. if return `false`, tree node will be hidden. | Function(value, data, node) | —               | —       |
 | accordion             | whether only one node among the same level can be expanded at one time | boolean                     | —               | false   |
 | indent                | horizontal indentation of nodes in adjacent levels in pixels | number                     | —    | 16 |
+| lazy              |  lazy load leaf node used with load method  | boolean                     | —    | false |
 
 ### props
 | Attribute | Description                              | Type   | Accepted Values | Default |
diff --git a/examples/docs/zh-CN/tree.md b/examples/docs/zh-CN/tree.md
index 5f6682c3b..d49f38163 100644
--- a/examples/docs/zh-CN/tree.md
+++ b/examples/docs/zh-CN/tree.md
@@ -937,7 +937,7 @@
 | node-key              | 每个树节点用来作为唯一标识的属性，整棵树应该是唯一的               | String                      | —    | —     |
 | props                 | 配置选项，具体看下表                               | object                      | —    | —     |
 | render-after-expand   | 是否在第一次展开某个树节点后才渲染其子节点         | boolean                      | —    | true |
-| load                  | 加载子树数据的方法                                | function(node, resolve)     | —    | —     |
+| load                  | 加载子树数据的方法,lazy属性必须为true                                | function(node, resolve)     | —    | —     |
 | render-content        | 树节点的内容区的渲染 Function                      | Function(h, { node, data, store }        | —    | —     |
 | highlight-current     | 是否高亮当前选中节点，默认值是 false。                   | boolean                     | —    | false |
 | default-expand-all    | 是否默认展开所有节点                               | boolean                     | —    | false |
@@ -950,6 +950,7 @@
 | filter-node-method    | 对树节点进行筛选时执行的方法，返回 true 表示这个节点可以显示，返回 false 则表示这个节点会被隐藏 | Function(value, data, node) | —    | —     |
 | accordion             | 是否每次只打开一个同级树节点展开                         | boolean                     | —    | false |
 | indent                | 相邻级节点间的水平缩进，单位为像素                        | number                     | —    | 16 |
+| lazy                  | 懒加载子节点，与load方法结合一起用                     | boolean                     | —    | false |
 
 ### props
 | 参数       | 说明                | 类型     | 可选值  | 默认值  |
diff --git a/types/upload.d.ts b/types/upload.d.ts
index c8f4f2f20..0c896fac7 100644
--- a/types/upload.d.ts
+++ b/types/upload.d.ts
@@ -15,7 +15,8 @@ export interface ElUploadInternalFileDetail {
   size: number,
   percentage: number,
   uid: number,
-  raw: File
+  raw: File,
+  url?: string
 }
 
 export interface ElUploadProgressEvent extends ProgressEvent {