diff --git a/composer.json b/composer.json
index 04057a1..7215999 100644
--- a/composer.json
+++ b/composer.json
@@ -10,6 +10,7 @@
     "license": "MIT",
     "require": {
         "php": ">=7.1",
+        "ext-curl": "*",
         "ext-fileinfo": "*",
         "ext-openssl": "*",
         "ext-json": "*",
diff --git a/src/Kernel/AppClient.php b/src/Kernel/AppClient.php
index fa15e5b..7990e31 100755
--- a/src/Kernel/AppClient.php
+++ b/src/Kernel/AppClient.php
@@ -8,8 +8,8 @@ use EasyAlipay\Kernel\Exceptions\InvalidConfigException;
 use EasyAlipay\Kernel\Exceptions\InvalidSignException;
 use EasyAlipay\Kernel\Support\Collection;
 use EasyAlipay\Kernel\Traits\SingData;
-use function EasyAlipay\Kernel\encrypt;
 use function EasyAlipay\Kernel\decrypt;
+use function EasyAlipay\Kernel\encrypt;
 
 class AppClient extends BaseClient
 {
@@ -161,7 +161,19 @@ class AppClient extends BaseClient
         //签名
         $sysParams["sign"] = $this->generateSign(array_merge($apiParams, $sysParams), $this->signType);
         $requestUrl = $this->buildRequestUrl($sysParams);
-        $result = $this->httpPost($requestUrl, $apiParams);
+        $files = [];
+        $postMultipart = false;
+        $newParams = [];
+        foreach ($apiParams as $k => $v) {
+            if ("@" == substr($v, 0, 1)) {
+                $postMultipart = true;
+            }
+        }
+        if ($postMultipart) {
+            $result = $this->curl($requestUrl,$apiParams);
+        } else {
+            $result = $this->httpPost($requestUrl, $apiParams);
+        }
         if (isset($result[$this->ERROR_RESPONSE])) { //返回错误
             throw new BadRequestException(
                 'Get Alipay API Error:' . $result[$this->ERROR_RESPONSE]['msg'] .
@@ -308,4 +320,58 @@ class AppClient extends BaseClient
         $str = preg_match('/[\x80-\xff]/', $this->appId) ? $this->appId : print_r($request, true);
         $this->fileCharset = mb_detect_encoding($str, "UTF-8, GBK") == 'UTF-8' ? 'UTF-8' : 'GBK';
     }
+
+    /**
+     * @param $url
+     * @param null $postFields
+     * @return mixed
+     * @throws \Exception
+     */
+    protected function curl($url, $postFields = null)
+    {
+        $ch = curl_init();
+        curl_setopt($ch, CURLOPT_URL, $this->gatewayUrl.$url);
+        curl_setopt($ch, CURLOPT_FAILONERROR, false);
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+        $postBodyString = "";
+        $encodeArray = Array();
+        $postMultipart = false;
+        if (is_array($postFields) && 0 < count($postFields)) {
+            foreach ($postFields as $k => $v) {
+                if ("@" != substr($v, 0, 1)) //判断是不是文件上传
+                {
+                    $postBodyString .= "$k=" . urlencode($this->characet($v, $this->postCharset)) . "&";
+                    $encodeArray[$k] = $this->characet($v, $this->postCharset);
+                } else //文件上传用multipart/form-data，否则用www-form-urlencoded
+                {
+                    $postMultipart = true;
+                    $encodeArray[$k] = new \CURLFile(substr($v, 1));
+                }
+            }
+            unset ($k, $v);
+            curl_setopt($ch, CURLOPT_POST, true);
+            if ($postMultipart) {
+                curl_setopt($ch, CURLOPT_POSTFIELDS, $encodeArray);
+            } else {
+                curl_setopt($ch, CURLOPT_POSTFIELDS, substr($postBodyString, 0, -1));
+            }
+        }
+        if (!$postMultipart) {
+            $headers = array('content-type: application/x-www-form-urlencoded;charset=' . $this->postCharset);
+            curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
+        }
+        $reponse = curl_exec($ch);
+
+        if (curl_errno($ch)) {
+            throw new \Exception(curl_error($ch), 0);
+        } else {
+            $httpStatusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+            if (200 !== $httpStatusCode) {
+                throw new \Exception($reponse, $httpStatusCode);
+            }
+        }
+        curl_close($ch);
+        return json_decode($reponse,1);
+    }
 }