diff --git a/lib/index.js b/lib/index.js
index 1deb997..45251e6 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -278,6 +278,10 @@ export default class IncomingForm extends EventEmitter {
   #createUrlencodedParser() {
     this.#parser = new UrlencodedParser()
 
+    if (this.bytesExpected) {
+      this.#parser.initLength(this.bytesExpected)
+    }
+
     this.#parser
       .on('field', fields => this.emit('field', false, fields))
       .on('end', () => this.#handleEnd())
diff --git a/package.json b/package.json
index ec82633..848272d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@gm5/request",
-  "version": "2.0.6",
+  "version": "2.0.7",
   "description": "对Http的Request进一步封装, 提供常用的API",
   "main": "index.js",
   "author": "yutent",