diff --git a/src/mock/xhr/xhr.js b/src/mock/xhr/xhr.js
index daf2af4b..4c00f6bc 100644
--- a/src/mock/xhr/xhr.js
+++ b/src/mock/xhr/xhr.js
@@ -264,6 +264,12 @@ Util.extend(MockXMLHttpRequest.prototype, {
 
         // 原生 XHR
         if (!this.match) {
+            // 修复timeout和withCredentials不生效的问题
+            Util.extend(that.custom.xhr, {
+                timeout: that.timeout,
+                withCredentials: that.withCredentials
+            });
+
             this.custom.xhr.send(data)
             return
         }
@@ -439,4 +445,4 @@ function convert(item, options) {
         item.template(options) : MockXMLHttpRequest.Mock.mock(item.template)
 }
 
-module.exports = MockXMLHttpRequest
\ No newline at end of file
+module.exports = MockXMLHttpRequest