diff --git a/src/Application/TakeoutSaaS.Application/App/Orders/Validators/CreateOrderCommandValidator.cs b/src/Application/TakeoutSaaS.Application/App/Orders/Validators/CreateOrderCommandValidator.cs
index 729d166..60f3d0c 100644
--- a/src/Application/TakeoutSaaS.Application/App/Orders/Validators/CreateOrderCommandValidator.cs
+++ b/src/Application/TakeoutSaaS.Application/App/Orders/Validators/CreateOrderCommandValidator.cs
@@ -1,5 +1,7 @@
 using FluentValidation;
 using TakeoutSaaS.Application.App.Orders.Commands;
+using TakeoutSaaS.Domain.Orders.Enums;
+using TakeoutSaaS.Domain.Payments.Enums;
 
 namespace TakeoutSaaS.Application.App.Orders.Validators;
 
@@ -25,6 +27,37 @@ public sealed class CreateOrderCommandValidator : AbstractValidator<CreateOrderC
         RuleFor(x => x.DiscountAmount).GreaterThanOrEqualTo(0);
         RuleFor(x => x.PayableAmount).GreaterThanOrEqualTo(0);
         RuleFor(x => x.PaidAmount).GreaterThanOrEqualTo(0);
+        RuleFor(x => x.PayableAmount)
+            .Must((cmd, payable) => payable == cmd.ItemsAmount - cmd.DiscountAmount)
+            .WithMessage("应付金额必须等于商品金额减去优惠金额");
+        RuleFor(x => x.PaidAmount)
+            .LessThanOrEqualTo(x => x.PayableAmount)
+            .WithMessage("实付金额不得超过应付金额");
+
+        RuleFor(x => x.PaymentStatus)
+            .Must(status => status is PaymentStatus.Unpaid or PaymentStatus.Paying or PaymentStatus.Paid or PaymentStatus.Failed or PaymentStatus.Refunded)
+            .WithMessage("支付状态不合法");
+        When(x => x.PaymentStatus == PaymentStatus.Paid, () =>
+        {
+            RuleFor(x => x.PaidAt).NotNull().WithMessage("支付成功必须包含支付时间");
+            RuleFor(x => x.PaidAmount).GreaterThan(0).WithMessage("支付成功时实付金额必须大于 0");
+        });
+        When(x => x.PaymentStatus != PaymentStatus.Paid, () =>
+        {
+            RuleFor(x => x.PaidAt).Must(paidAt => paidAt == null).WithMessage("非支付成功状态不应包含支付时间");
+        });
+        When(x => x.PaymentStatus == PaymentStatus.Refunded, () =>
+        {
+            RuleFor(x => x.PaidAmount).GreaterThanOrEqualTo(0).WithMessage("退款状态下实付金额需合法");
+        });
+        When(x => x.Status == OrderStatus.Cancelled, () =>
+        {
+            RuleFor(x => x.CancelReason).NotEmpty().WithMessage("取消订单必须提供取消原因");
+        });
+        When(x => x.Status != OrderStatus.Cancelled, () =>
+        {
+            RuleFor(x => x.CancelReason).Must(reason => string.IsNullOrWhiteSpace(reason)).WithMessage("非取消状态不应包含取消原因");
+        });
 
         RuleFor(x => x.Items)
             .NotEmpty()
diff --git a/src/Application/TakeoutSaaS.Application/App/Orders/Validators/UpdateOrderCommandValidator.cs b/src/Application/TakeoutSaaS.Application/App/Orders/Validators/UpdateOrderCommandValidator.cs
index 2dba2f7..745f033 100644
--- a/src/Application/TakeoutSaaS.Application/App/Orders/Validators/UpdateOrderCommandValidator.cs
+++ b/src/Application/TakeoutSaaS.Application/App/Orders/Validators/UpdateOrderCommandValidator.cs
@@ -1,5 +1,7 @@
 using FluentValidation;
 using TakeoutSaaS.Application.App.Orders.Commands;
+using TakeoutSaaS.Domain.Orders.Enums;
+using TakeoutSaaS.Domain.Payments.Enums;
 
 namespace TakeoutSaaS.Application.App.Orders.Validators;
 
@@ -26,5 +28,36 @@ public sealed class UpdateOrderCommandValidator : AbstractValidator<UpdateOrderC
         RuleFor(x => x.DiscountAmount).GreaterThanOrEqualTo(0);
         RuleFor(x => x.PayableAmount).GreaterThanOrEqualTo(0);
         RuleFor(x => x.PaidAmount).GreaterThanOrEqualTo(0);
+        RuleFor(x => x.PayableAmount)
+            .Must((cmd, payable) => payable == cmd.ItemsAmount - cmd.DiscountAmount)
+            .WithMessage("应付金额必须等于商品金额减去优惠金额");
+        RuleFor(x => x.PaidAmount)
+            .LessThanOrEqualTo(x => x.PayableAmount)
+            .WithMessage("实付金额不得超过应付金额");
+
+        RuleFor(x => x.PaymentStatus)
+            .Must(status => status is PaymentStatus.Unpaid or PaymentStatus.Paying or PaymentStatus.Paid or PaymentStatus.Failed or PaymentStatus.Refunded)
+            .WithMessage("支付状态不合法");
+        When(x => x.PaymentStatus == PaymentStatus.Paid, () =>
+        {
+            RuleFor(x => x.PaidAt).NotNull().WithMessage("支付成功必须包含支付时间");
+            RuleFor(x => x.PaidAmount).GreaterThan(0).WithMessage("支付成功时实付金额必须大于 0");
+        });
+        When(x => x.PaymentStatus != PaymentStatus.Paid, () =>
+        {
+            RuleFor(x => x.PaidAt).Must(paidAt => paidAt == null).WithMessage("非支付成功状态不应包含支付时间");
+        });
+        When(x => x.PaymentStatus == PaymentStatus.Refunded, () =>
+        {
+            RuleFor(x => x.PaidAmount).GreaterThanOrEqualTo(0).WithMessage("退款状态下实付金额需合法");
+        });
+        When(x => x.Status == OrderStatus.Cancelled, () =>
+        {
+            RuleFor(x => x.CancelReason).NotEmpty().WithMessage("取消订单必须提供取消原因");
+        });
+        When(x => x.Status != OrderStatus.Cancelled, () =>
+        {
+            RuleFor(x => x.CancelReason).Must(reason => string.IsNullOrWhiteSpace(reason)).WithMessage("非取消状态不应包含取消原因");
+        });
     }
 }
diff --git a/src/Application/TakeoutSaaS.Application/App/Payments/Validators/CreatePaymentCommandValidator.cs b/src/Application/TakeoutSaaS.Application/App/Payments/Validators/CreatePaymentCommandValidator.cs
index f7e7abb..5041e1d 100644
--- a/src/Application/TakeoutSaaS.Application/App/Payments/Validators/CreatePaymentCommandValidator.cs
+++ b/src/Application/TakeoutSaaS.Application/App/Payments/Validators/CreatePaymentCommandValidator.cs
@@ -1,5 +1,6 @@
 using FluentValidation;
 using TakeoutSaaS.Application.App.Payments.Commands;
+using TakeoutSaaS.Domain.Payments.Enums;
 
 namespace TakeoutSaaS.Application.App.Payments.Validators;
 
@@ -15,8 +16,30 @@ public sealed class CreatePaymentCommandValidator : AbstractValidator<CreatePaym
     {
         RuleFor(x => x.OrderId).GreaterThan(0);
         RuleFor(x => x.Amount).GreaterThan(0);
+        RuleFor(x => x.Method)
+            .Must(method => method != PaymentMethod.Unknown)
+            .WithMessage("支付方式不可为空");
         RuleFor(x => x.TradeNo).MaximumLength(64);
         RuleFor(x => x.ChannelTransactionId).MaximumLength(64);
         RuleFor(x => x.Remark).MaximumLength(256);
+
+        RuleFor(x => x.Status)
+            .Must(status => status is PaymentStatus.Unpaid or PaymentStatus.Paying or PaymentStatus.Paid or PaymentStatus.Failed or PaymentStatus.Refunded)
+            .WithMessage("支付状态不合法");
+        When(x => x.Status == PaymentStatus.Paid, () =>
+        {
+            RuleFor(x => x.PaidAt).NotNull().WithMessage("支付成功必须包含支付时间");
+        });
+        When(x => x.Status != PaymentStatus.Paid, () =>
+        {
+            RuleFor(x => x.PaidAt).Must(paidAt => paidAt == null).WithMessage("非支付成功状态不应包含支付时间");
+        });
+
+        When(x => x.Method is PaymentMethod.Cash or PaymentMethod.Card or PaymentMethod.Balance, () =>
+        {
+            RuleFor(x => x.Status)
+                .Must(status => status is not PaymentStatus.Paying)
+                .WithMessage("线下/余额支付不允许处于 Paying 状态");
+        });
     }
 }
diff --git a/src/Application/TakeoutSaaS.Application/App/Payments/Validators/UpdatePaymentCommandValidator.cs b/src/Application/TakeoutSaaS.Application/App/Payments/Validators/UpdatePaymentCommandValidator.cs
index 997e07b..65dfd1c 100644
--- a/src/Application/TakeoutSaaS.Application/App/Payments/Validators/UpdatePaymentCommandValidator.cs
+++ b/src/Application/TakeoutSaaS.Application/App/Payments/Validators/UpdatePaymentCommandValidator.cs
@@ -1,5 +1,6 @@
 using FluentValidation;
 using TakeoutSaaS.Application.App.Payments.Commands;
+using TakeoutSaaS.Domain.Payments.Enums;
 
 namespace TakeoutSaaS.Application.App.Payments.Validators;
 
@@ -16,8 +17,30 @@ public sealed class UpdatePaymentCommandValidator : AbstractValidator<UpdatePaym
         RuleFor(x => x.PaymentId).GreaterThan(0);
         RuleFor(x => x.OrderId).GreaterThan(0);
         RuleFor(x => x.Amount).GreaterThan(0);
+        RuleFor(x => x.Method)
+            .Must(method => method != PaymentMethod.Unknown)
+            .WithMessage("支付方式不可为空");
         RuleFor(x => x.TradeNo).MaximumLength(64);
         RuleFor(x => x.ChannelTransactionId).MaximumLength(64);
         RuleFor(x => x.Remark).MaximumLength(256);
+
+        RuleFor(x => x.Status)
+            .Must(status => status is PaymentStatus.Unpaid or PaymentStatus.Paying or PaymentStatus.Paid or PaymentStatus.Failed or PaymentStatus.Refunded)
+            .WithMessage("支付状态不合法");
+        When(x => x.Status == PaymentStatus.Paid, () =>
+        {
+            RuleFor(x => x.PaidAt).NotNull().WithMessage("支付成功必须包含支付时间");
+        });
+        When(x => x.Status != PaymentStatus.Paid, () =>
+        {
+            RuleFor(x => x.PaidAt).Must(paidAt => paidAt == null).WithMessage("非支付成功状态不应包含支付时间");
+        });
+
+        When(x => x.Method is PaymentMethod.Cash or PaymentMethod.Card or PaymentMethod.Balance, () =>
+        {
+            RuleFor(x => x.Status)
+                .Must(status => status is not PaymentStatus.Paying)
+                .WithMessage("线下/余额支付不允许处于 Paying 状态");
+        });
     }
 }