diff --git a/YD_Event.Application/Event/UnifiedRegistrationService.cs b/YD_Event.Application/Event/UnifiedRegistrationService.cs
index c704352..16b1483 100644
--- a/YD_Event.Application/Event/UnifiedRegistrationService.cs
+++ b/YD_Event.Application/Event/UnifiedRegistrationService.cs
@@ -141,6 +141,13 @@ public class UnifiedRegistrationService : ITransient
         registration.TotalPersonCount = totalPersonCount;
         await _registrationRepository.UpdateAsync(registration);
 
+        // 5. 如果是免费赛事，直接完成支付
+        if (totalAmount <= 0)
+        {
+            _logger.LogInformation("免费赛事，直接完成支付，报名ID: {RegistrationId}", registration.Id);
+            await HandleFreePaymentAsync(registration, null, input.CreatedUserId);
+        }
+
         _logger.LogInformation("统一报名处理完成，报名ID: {RegistrationId}", registration.Id);
 
         return new UnifiedRegistrationOutput
diff --git a/YD_Event.Application/YD_Event.Application.xml b/YD_Event.Application/YD_Event.Application.xml
index 8f0cc52..f5bd1a9 100644
--- a/YD_Event.Application/YD_Event.Application.xml
+++ b/YD_Event.Application/YD_Event.Application.xml
@@ -9059,7 +9059,7 @@
             验证用户单位认证状态
             </summary>
         </member>
-        <member name="M:YD_Event.Application.Event.UnifiedRegistrationService.CalculateRefundAmountAsync(System.Decimal,System.DateTime)">
+        <member name="M:YD_Event.Application.Event.UnifiedRegistrationService.RoundUpToTwoDecimalPlaces(System.Decimal)">
             <summary>
             计算退款金额（统一方法）
             </summary>