diff --git a/wx/V3/WxV3PaymentTait.php b/wx/V3/WxV3PaymentTait.php
index 58567da..723853b 100644
--- a/wx/V3/WxV3PaymentTait.php
+++ b/wx/V3/WxV3PaymentTait.php
@@ -75,7 +75,7 @@ trait WxV3PaymentTait
     {
         $config   = $this->getPayConfig();
         $parseUrl = '/v3/pay/transactions/out-trade-no/' . $orderNo;
-        $sign     = $this->signature('POST', $parseUrl . '?mchid=' . $config->pay->wx->mchId);
+        $sign     = $this->signature('GET', $parseUrl . '?mchid=' . $config->pay->wx->mchId);
         $client   = $this->createClient($sign, '');
         $client->withAddedHeader('Accept', 'application/json');
         $client->get($parseUrl, ['mchid' => $config->pay->wx->mchId]);