diff --git a/YD_Event.Application/Event/EventStatusUpdateService.cs b/YD_Event.Application/Event/EventStatusUpdateService.cs
index 0ff9519..e455c7e 100644
--- a/YD_Event.Application/Event/EventStatusUpdateService.cs
+++ b/YD_Event.Application/Event/EventStatusUpdateService.cs
@@ -8,13 +8,14 @@ namespace YD_Event.Application.Event;
 
 /// <summary>
 /// 赛事状态自动更新后台服务
-/// 每5分钟执行一次，自动更新赛事状态
+/// 每10秒执行一次，自动更新赛事状态
 /// </summary>
 public class EventStatusUpdateService : BackgroundService
 {
     private readonly IServiceProvider _serviceProvider;
     private readonly ILogger<EventStatusUpdateService> _logger;
     private readonly PeriodicTimer _timer;
+    private int _executionCount = 0;
 
     public EventStatusUpdateService(
         IServiceProvider serviceProvider,
@@ -22,12 +23,12 @@ public class EventStatusUpdateService : BackgroundService
     {
         _serviceProvider = serviceProvider;
         _logger = logger;
-        _timer = new PeriodicTimer(TimeSpan.FromMinutes(5));
+        _timer = new PeriodicTimer(TimeSpan.FromSeconds(10));
     }
 
     protected override async Task ExecuteAsync(CancellationToken stoppingToken)
     {
-        _logger.LogInformation("赛事状态自动更新服务已启动，每5分钟执行一次");
+        _logger.LogInformation("赛事状态自动更新服务已启动，每10秒执行一次");
 
         try
         {
@@ -57,12 +58,46 @@ public class EventStatusUpdateService : BackgroundService
 
             var now = DateTime.Now;
             var eventsToUpdate = new List<EventInfo>();
+            
+            _executionCount++;
+            
+            // 每执行6次（约1分钟）做一次全量检查，其他时候只检查时间窗口内的赛事
+            var isFullCheck = _executionCount % 6 == 1;
+            
+            List<EventInfo> candidateEvents;
 
-            var allEvents = await repository.AsQueryable()
-                .Where(e => !e.DeleteMark && e.Status == AvailabilityStatus.Enable)
-                .ToListAsync(stoppingToken);
+            if (isFullCheck)
+            {
+                _logger.LogDebug("执行全量赛事状态检查...");
+                candidateEvents = await repository.AsQueryable()
+                    .Where(e => !e.DeleteMark && e.Status == AvailabilityStatus.Enable)
+                    .ToListAsync(stoppingToken);
+            }
+            else
+            {
+                // 优化查询：只查询可能需要更新状态的赛事
+                // 逻辑：只查询那些当前时间接近关键时间点（报名开始/结束、比赛开始/结束）的赛事
+                // 设置一个时间窗口：当前时间前后各1分钟，这样只会处理即将或刚发生状态变化的赛事
+                var timeWindow = TimeSpan.FromMinutes(1);
+                var windowStart = now.Add(-timeWindow);
+                var windowEnd = now.Add(timeWindow);
 
-            foreach (var evt in allEvents)
+                candidateEvents = await repository.AsQueryable()
+                    .Where(e => !e.DeleteMark && e.Status == AvailabilityStatus.Enable)
+                    .Where(e => 
+                        // 报名开始时间在时间窗口内
+                        (e.RegistrationStartTime >= windowStart && e.RegistrationStartTime <= windowEnd) ||
+                        // 报名结束时间在时间窗口内
+                        (e.RegistrationEndTime >= windowStart && e.RegistrationEndTime <= windowEnd) ||
+                        // 比赛开始时间在时间窗口内
+                        (e.MatchStartTime >= windowStart && e.MatchStartTime <= windowEnd) ||
+                        // 比赛结束时间在时间窗口内
+                        (e.MatchEndTime >= windowStart && e.MatchEndTime <= windowEnd)
+                    )
+                    .ToListAsync(stoppingToken);
+            }
+
+            foreach (var evt in candidateEvents)
             {
                 var newStatus = CalculateEventStatus(evt, now);
                 if (evt.EventStatus != newStatus)