diff --git a/backend/app/Constants/PaymentMethod.php b/backend/app/Constants/PaymentMethod.php
new file mode 100644
index 0000000..c7a7db6
--- /dev/null
+++ b/backend/app/Constants/PaymentMethod.php
@@ -0,0 +1,81 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Constants;
+
+use Hyperf\Constants\Annotation\Constants;
+use Hyperf\Constants\Annotation\Message;
+use Hyperf\Constants\EnumConstantsTrait;
+
+#[Constants]
+enum PaymentMethod: int
+{
+    use EnumConstantsTrait;
+
+    #[Message("4-在线支付")]
+    case ONLINE_PAYMENT = 1;
+
+    #[Message("支付宝")]
+    case ALIPAY_CN = 2;
+
+    #[Message("5-公司转帐")]
+    case COMPANY_TRANSFER = 3;
+
+    #[Message("wechat pay")]
+    case WECHAT_PAY = 4;
+
+    #[Message("クレジットカード")]
+    case CREDIT_CARD = 5;
+
+    #[Message("代金引換")]
+    case CASH_ON_DELIVERY_JP = 6;
+
+    #[Message("後払い")]
+    case DEFERRED_PAYMENT = 7;
+
+    #[Message("ショッピングクレジット／ローン")]
+    case SHOPPING_CREDIT_LOAN = 8;
+
+    #[Message("オートローン")]
+    case AUTO_LOAN = 9;
+
+    #[Message("リース")]
+    case LEASE = 10;
+
+    #[Message("請求書払い")]
+    case INVOICE_PAYMENT = 11;
+
+    #[Message("ポイント")]
+    case POINTS = 12;
+
+    #[Message("銀行振込")]
+    case BANK_TRANSFER = 13;
+
+    #[Message("Apple Pay")]
+    case APPLE_PAY = 14;
+
+    #[Message("セブンイレブン（前払）")]
+    case SEVEN_ELEVEN_PREPAID = 15;
+
+    #[Message("ローソン、郵便局ATM等（前払）")]
+    case LAWSON_POST_ATM_PREPAID = 16;
+
+    #[Message("Alipay")]
+    case ALIPAY = 17;
+
+    #[Message("PayPal")]
+    case PAYPAL = 18;
+
+    #[Message("後払い決済")]
+    case DEFERRED_SETTLEMENT = 19;
+
+    #[Message("Other")]
+    case OTHER = 20;
+
+    #[Message("COD")]
+    case COD = 21;
+
+    #[Message("CVS")]
+    case CVS = 22;
+}