diff --git a/package.json b/package.json
index 1e61b59..ffc1030 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bytedo/fetch",
-  "version": "2.1.2",
+  "version": "2.1.3",
   "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 b5456b2..5d59ca6 100644
--- a/src/index.js
+++ b/src/index.js
@@ -146,7 +146,10 @@ class _Request {
             }
           }
       }
+    } else {
+      delete options.headers['content-type']
     }
+
     if (hasAttach) {
       delete options.headers['content-type']
     }
diff --git a/src/next.js b/src/next.js
index 49ce53d..f7a4bfa 100644
--- a/src/next.js
+++ b/src/next.js
@@ -122,7 +122,10 @@ class _Request {
           }
           break
       }
+    } else {
+      delete options.headers['content-type']
     }
+
     if (hasAttach) {
       delete options.headers['content-type']
     }