diff --git a/YD_Event.Application/Event/UnifiedRegistrationService.cs b/YD_Event.Application/Event/UnifiedRegistrationService.cs
index a53e8fc..306f28c 100644
--- a/YD_Event.Application/Event/UnifiedRegistrationService.cs
+++ b/YD_Event.Application/Event/UnifiedRegistrationService.cs
@@ -929,7 +929,7 @@ public class UnifiedRegistrationService : ITransient
         
         if (coupon.Type == 0) // 折扣
         {
-            discountAmount = originalAmount * (1 - coupon.Value / 100);
+            discountAmount = originalAmount * coupon.Value / 100;
         }
         else if (coupon.Type == 1) // 定额
         {