diff --git a/package.json b/package.json
index 2ac437c..1e61b59 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bytedo/fetch",
-  "version": "2.1.1",
+  "version": "2.1.2",
   "description": "全新的ajax封装。分2个版本, 一个基于XMLHttpRequest, 一个基于window.fetch",
   "main": "dist/index.js",
   "files": [
diff --git a/src/index.js b/src/index.js
index 726f769..b5456b2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -127,7 +127,10 @@ class _Request {
             params = options.body
           } else {
             for (let k in options.body) {
-              if (toS.call(options.body[k]) === '[object File]') {
+              if (
+                toS.call(options.body[k]) === '[object File]' ||
+                toS.call(options.body[k]) === '[object Blob]'
+              ) {
                 hasAttach = true
                 break
               }
diff --git a/src/lib/format.js b/src/lib/format.js
index c99cc48..a17536c 100644
--- a/src/lib/format.js
+++ b/src/lib/format.js
@@ -15,7 +15,7 @@ export const decode = decodeURIComponent
 function serialize(p, obj, query) {
   var k
   if (Array.isArray(obj)) {
-    obj.forEach(function(it, i) {
+    obj.forEach(function (it, i) {
       k = p ? `${p}[${Array.isArray(it) ? i : ''}]` : i
       if (typeof it === 'object') {
         serialize(k, it, query)
@@ -84,7 +84,7 @@ export const Format = {
     for (let i in data) {
       let el = data[i]
       if (Array.isArray(el)) {
-        el.forEach(function(it) {
+        el.forEach(function (it) {
           form.append(i + '[]', it)
         })
       } else {
@@ -99,13 +99,13 @@ export const Format = {
     }
 
     let arr = []
-    let query = function(k, v) {
+    let query = function (k, v) {
       if (/native code/.test(v)) {
         return
       }
 
       v = typeof v === 'function' ? v() : v
-      v = toS.call(v) === '[object File]' ? v : encode(v)
+      v = toS.call(v) === '[object File]' || toS.call(v) === '[object Blob]' ? v : encode(v)
 
       arr.push(encode(k) + '=' + v)
     }
diff --git a/src/next.js b/src/next.js
index a0936c1..49ce53d 100644
--- a/src/next.js
+++ b/src/next.js
@@ -104,7 +104,10 @@ class _Request {
             }
           } else {
             for (let k in options.body) {
-              if (toS.call(options.body[k]) === '[object File]') {
+              if (
+                toS.call(options.body[k]) === '[object File]' ||
+                toS.call(options.body[k]) === '[object Blob]'
+              ) {
                 hasAttach = true
                 break
               }