diff --git a/docs/docs/en.md b/docs/docs/en.md
index a4e737f..f26e7b1 100644
--- a/docs/docs/en.md
+++ b/docs/docs/en.md
@@ -545,6 +545,25 @@ Whether to open the drag directory
 
 
 
+### add-index
+
+* **Type:** `Boolean, Number`
+
+* **Default:** `undefined`
+
+* **Version:** : `>=2.6.1`
+
+* **Details:**
+
+  The default value of the `index` parameter for the [`add()`](#instance-methods-add) method
+
+* **Usage:**
+  ```html
+  <file-upload :add-index="true"></file-upload>
+  ```
+
+
+
 
 ## Options / Events
 
@@ -866,7 +885,7 @@ Add one or more files
 * **Arguments:**
 
   * `files: Array<File | window.File | Object> | File | window.File | Object`     If it is an array of responses will be an array
-  * `start: Boolean`                                  Whether it is inserted from the start position
+  * `index: Number | Boolean` = [`props.add-index`](#options-props-add-index)   `true = ` Start, `false = ` End, `Number = ` Index
 
 
 * **Result:** `Object | Array<File | Object> | Boolean`     The incoming array is returned to the array otherwise the object or `false`
@@ -1013,6 +1032,17 @@ Remove a file object
   </script>
   ```
 
+### replace()
+  Replace the location of the two files
+
+* **Arguments:**
+
+  * `id1: File | Object | String`
+  * `id2: File | Object | String`
+
+
+* **Result:**  `Boolean`
+
 
 ### clear()
 
diff --git a/docs/docs/zh-cn.md b/docs/docs/zh-cn.md
index 9f18e70..c6cbcb9 100644
--- a/docs/docs/zh-cn.md
+++ b/docs/docs/zh-cn.md
@@ -540,6 +540,23 @@ input标签的 `name` 属性
   ```
 
 
+### add-index
+
+* **类型:** `Boolean, Number`
+
+* **默认值:** `undefined`
+
+* **详细:**
+
+* **版本:** `>= 2.6.1`
+
+  [`add()`](#实例-方法-add) 方法 `index` 参数的默认值
+
+* **示例:**
+  ```html
+  <file-upload :add-index="true"></file-upload>
+  ```
+
 
 
 ## 选项 / 事件
@@ -860,7 +877,7 @@ Add, update, remove pre-filter
 * **参数:**
 
   * `files: Array<File | window.File | Object> | File | window.File | Object`     如果它是一个数组的响应将是一个数组
-  * `start: Boolean`                                  是否从开始位置插入
+  * `index: Number | Boolean` = [`props.add-index`](#选项-属性-add-index)   `true = ` 开始位置, `false = ` 结束位置, `Number = ` 下标位置
 
 
 * **结果:** `Object | Array<File | Object> | Boolean`     传入的是数组返回数组否则对象或`false`
@@ -1008,6 +1025,19 @@ Add, update, remove pre-filter
   ```
 
 
+### replace()
+  替换两个文件的位置
+
+* **参数:**
+
+  * `id1: File | Object | String`
+  * `id2: File | Object | String`
+
+
+* **结果:**  `Boolean`
+
+
+
 ### clear()
 
 清空文件列表
diff --git a/docs/views/examples/Full.vue b/docs/views/examples/Full.vue
index 3548ba4..82d6d16 100644
--- a/docs/views/examples/Full.vue
+++ b/docs/views/examples/Full.vue
@@ -97,6 +97,7 @@
           :data="data"
           :drop="drop"
           :drop-directory="dropDirectory"
+          :add-index="addIndex"
           v-model="files"
           @input-filter="inputFilter"
           @input-file="inputFile"
@@ -163,6 +164,14 @@
       <label for="minSize">Min size:</label>
       <input type="number" min="0" id="minSize" class="form-control" v-model.number="minSize">
     </div>
+    <div class="form-group">
+      <div class="form-check">
+        <label class="form-check-label">
+          <input type="checkbox" id="add-index" class="form-check-input" v-model="addIndex"> Start position to add
+        </label>
+      </div>
+      <small class="form-text text-muted">Add a file list to start the location to add</small>
+    </div>
     <div class="form-group">
       <div class="form-check">
         <label class="form-check-label">
@@ -384,6 +393,7 @@ export default {
       directory: false,
       drop: true,
       dropDirectory: true,
+      addIndex: false,
       thread: 3,
       name: 'file',
       postAction: '/upload/post',
diff --git a/package.json b/package.json
index bfcfa93..ad43488 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "vue-upload-component",
   "description": "Vue.js file upload component, Multi-file upload, Upload directory, Drag upload, Drag the directory, Upload multiple files at the same time, html4 (IE 9), `PUT` method, Customize the filter",
-  "version": "2.6.0-beta.3",
+  "version": "2.6.1",
   "author": "LianYue",
   "scripts": {
     "dev": "cross-env NODE_ENV=development webpack-dev-server",
diff --git a/src/FileUpload.vue b/src/FileUpload.vue
index abe3958..3732029 100644
--- a/src/FileUpload.vue
+++ b/src/FileUpload.vue
@@ -56,6 +56,10 @@ export default {
       type: Boolean,
     },
 
+    addIndex: {
+      type: [Boolean, Number],
+    },
+
     directory: {
       type: Boolean,
     },
@@ -189,17 +193,7 @@ export default {
      * uploading 正在上传的线程
      * @return {[type]} [description]
      */
-    /*
-    uploading() {
-      let uploading = 0
-      for (var i = 0; i < this.files.length; i++) {
-        if (this.files[i].active) {
-          uploading++
-        }
-      }
-      return uploading
-    },
-    */
+
     /**
      * uploaded 文件列表是否全部已上传
      * @return {[type]} [description]
@@ -309,7 +303,7 @@ export default {
     },
 
     // 添加
-    add(_files, start) {
+    add(_files, index = this.addIndex) {
       let files = _files
       let isArray = files instanceof Array
 
@@ -403,8 +397,11 @@ export default {
 
       // 添加进去 files
       let newFiles
-      if (start) {
+      if (index === true || index === 0) {
         newFiles = addFiles.concat(this.files)
+      } else if (index) {
+        newFiles = addFiles.concat([])
+        newFiles.splice(index, 0, addFiles)
       } else {
         newFiles = this.files.concat(addFiles)
       }
@@ -536,6 +533,25 @@ export default {
     },
 
 
+    replace(id1, id2) {
+      let file1 = this.get(id1)
+      let file2 = this.get(id2)
+      if (!file1 || !file2 || file1 === file2) {
+        return false
+      }
+      let files = this.files.concat([])
+      let index1 = files.indexOf(file1)
+      let index2 = files.indexOf(file2)
+      if (index1 === -1 || index2 === -1) {
+        return false
+      }
+      files[index1] = file2
+      files[index2] = file1
+      this.files = files
+      this.emitInput()
+      return true
+    },
+
     // 移除
     remove(id) {
       let file = this.get(id)
@@ -601,6 +617,7 @@ export default {
     },
 
 
+
     // 预处理 事件 过滤器
     emitFilter(newFile, oldFile) {
       let isPrevent = false