diff --git a/lib/api_material.js b/lib/api_material.js
index a5151bc..117fcbe 100644
--- a/lib/api_material.js
+++ b/lib/api_material.js
@@ -25,13 +25,20 @@ const { postJSON } = require('./util');
  * Shortcut: * - `exports.uploadImageMaterial(filepath);`
  * - `exports.uploadVoiceMaterial(filepath);`
  * - `exports.uploadThumbMaterial(filepath);` * @param {String} filepath 文件路径
- * @param {String} type 媒体类型，可用值有image、voice、video、thumb
+ * @param {String|Buffer} filepath 文件路径/文件Buffer数据
+ * @param {String} type 媒体类型，可用值有image、voice、thumb
+ * @param {String} filename 文件名
+ * @param {String} mime 文件类型,filepath为Buffer数据时才需要传
  */
-exports.uploadMaterial = async function (filepath, type) {
+exports.uploadMaterial = async function (filepath, type, filename, mime) {
   const { accessToken } = await this.ensureAccessToken();
-  var stat = await statAsync(filepath);
   var form = formstream();
-  form.file('media', filepath, path.basename(filepath), stat.size);
+  if (Buffer.isBuffer(filepath)) {
+    form.buffer('media', filepath, filename, mime);
+  } else if (typeof filepath === 'string') {
+    var stat = await statAsync(filepath);
+    form.file('media', filepath, filename || path.basename(filepath), stat.size);
+  }
   var url = this.prefix + 'material/add_material?access_token=' + accessToken + '&type=' + type;
   var opts = {
     dataType: 'json',
@@ -42,11 +49,11 @@ exports.uploadMaterial = async function (filepath, type) {
   };
   return this.request(url, opts);
 };
-
+  
 ['image', 'voice', 'thumb'].forEach(function (type) {
   var method = 'upload' + type[0].toUpperCase() + type.substring(1) + 'Material';
-  exports[method] = async function (filepath) {
-    return this.uploadMaterial(filepath, type);
+  exports[method] = async function (filepath, filename, mime) {
+    return this.uploadMaterial(filepath, type, filename, mime);
   };
 });