diff --git a/app/main/api/__debug_bin503801853.exe b/app/main/api/__debug_bin503801853.exe
deleted file mode 100644
index 3a3cb11..0000000
Binary files a/app/main/api/__debug_bin503801853.exe and /dev/null differ
diff --git a/app/main/api/internal/config/config.go b/app/main/api/internal/config/config.go
index 97aff3d..8479931 100644
--- a/app/main/api/internal/config/config.go
+++ b/app/main/api/internal/config/config.go
@@ -63,6 +63,7 @@ type WxpayConfig struct {
 	MchPrivateKeyPath          string
 	MchPublicKeyID             string
 	MchPublicKeyPath           string
+	MchPlatformRAS             string // 微信支付平台证书序列号（用于回调验证）
 	NotifyUrl                  string
 	RefundNotifyUrl            string
 }
diff --git a/app/main/api/internal/service/wechatpayService.go b/app/main/api/internal/service/wechatpayService.go
index 38dab11..d96e9f8 100644
--- a/app/main/api/internal/service/wechatpayService.go
+++ b/app/main/api/internal/service/wechatpayService.go
@@ -2,14 +2,14 @@ package service
 
 import (
 	"context"
-	"ycc-server/app/main/api/internal/config"
-	"ycc-server/app/main/model"
-	"ycc-server/common/ctxdata"
-	"ycc-server/pkg/lzkit/lzUtils"
 	"fmt"
 	"net/http"
 	"strconv"
 	"time"
+	"ycc-server/app/main/api/internal/config"
+	"ycc-server/app/main/model"
+	"ycc-server/common/ctxdata"
+	"ycc-server/pkg/lzkit/lzUtils"
 
 	"github.com/wechatpay-apiv3/wechatpay-go/core"
 	"github.com/wechatpay-apiv3/wechatpay-go/core/auth/verifiers"
@@ -137,10 +137,21 @@ func newWechatPayServiceWithWxPayPubKey(c config.Config, userAuthModel model.Use
 	}
 
 	// 初始化 notify.Handler
+	// 使用本地公钥直接验证，不依赖证书下载器（适用于2025年后新商户或平台证书过期的情况）
+	// SHA256WithRSACombinedVerifier 会先尝试从证书下载器获取证书，如果找不到且序列号匹配则使用本地公钥
+	// 注意：回调通知中的序列号需要与 publicKeyID 匹配才能使用本地公钥
+	// 如果配置了 MchPlatformRAS，使用它作为公钥ID（因为回调通知使用的序列号通常是平台证书序列号）
+	publicKeyIDForVerify := mchPublicKeyID
+	if c.Wxpay.MchPlatformRAS != "" {
+		// 如果配置了平台证书序列号，使用它作为验证时的公钥ID
+		// 这样回调通知中的序列号就能匹配上
+		publicKeyIDForVerify = c.Wxpay.MchPlatformRAS
+		logx.Infof("使用平台证书序列号作为公钥ID进行回调验证: %s", publicKeyIDForVerify)
+	}
 	certificateVisitor := downloader.MgrInstance().GetCertificateVisitor(mchID)
 	notifyHandler := notify.NewNotifyHandler(
 		mchAPIv3Key,
-		verifiers.NewSHA256WithRSACombinedVerifier(certificateVisitor, mchPublicKeyID, *mchPublicKey))
+		verifiers.NewSHA256WithRSACombinedVerifier(certificateVisitor, publicKeyIDForVerify, *mchPublicKey))
 
 	logx.Infof("微信支付客户端初始化成功(微信支付公钥方式)")
 	return &WechatPayService{