diff --git a/AssetManager.Data/Repositories/MarketDataRepository.cs b/AssetManager.Data/Repositories/MarketDataRepository.cs
index 2a7feed..63fdeae 100644
--- a/AssetManager.Data/Repositories/MarketDataRepository.cs
+++ b/AssetManager.Data/Repositories/MarketDataRepository.cs
@@ -54,7 +54,11 @@ public class MarketDataRepository : IMarketDataRepository
     public async Task<bool> SavePriceCacheAsync(MarketPriceCache cache)
     {
         cache.Id = GenerateCacheKey(cache.Symbol, cache.AssetType);
-        var result = await _db.Storageable(cache).ExecuteCommandAsync();
+        
+        // 使用新的 SqlSugarClient 实例，避免并发写入时连接冲突
+        // 连接池会复用底层连接，性能开销很小
+        using var db = SqlSugarConfig.GetSqlSugarClient();
+        var result = await db.Storageable(cache).ExecuteCommandAsync();
         return result > 0;
     }
 
diff --git a/AssetManager.Infrastructure/Services/MarketDataService.cs b/AssetManager.Infrastructure/Services/MarketDataService.cs
index 2a15689..54966d4 100755
--- a/AssetManager.Infrastructure/Services/MarketDataService.cs
+++ b/AssetManager.Infrastructure/Services/MarketDataService.cs
@@ -22,14 +22,11 @@ public class MarketDataService : IMarketDataService
     private readonly IOkxMarketService _okxService;
     private readonly IMarketDataRepository _marketDataRepo;
     
-    // 静态内存缓存层（跨请求共享，避免并发数据库查询导致连接池冲突）
+    // 静态内存缓存层（跨请求共享）
     private static readonly ConcurrentDictionary<string, (MarketPriceCache cache, DateTime expireAt)> _memoryCache = new();
     
     // 静态 pending 请求字典（跨请求共享，防止并发请求同一股票）
     private static readonly ConcurrentDictionary<string, Lazy<Task<MarketPriceResponse>>> _pendingPriceRequests = new();
-    
-    // 静态写入锁（串行化数据库写入）
-    private static readonly SemaphoreSlim _writeLock = new(1, 1);
 
     public MarketDataService(
         ILogger<MarketDataService> logger,
@@ -203,10 +200,10 @@ public class MarketDataService : IMarketDataService
             ExpiredAt = expireAt
         }, expireAt);
         
-        // 写入数据库缓存（串行化，避免连接冲突）
+        // 写入数据库缓存（后台执行，失败不影响主流程）
+        // SavePriceCacheAsync 每次创建新的 SqlSugarClient 实例，避免连接冲突
         _ = Task.Run(async () =>
         {
-            await _writeLock.WaitAsync();
             try
             {
                 await SavePriceCacheAsync(symbol, assetType, response, source);
@@ -215,10 +212,6 @@ public class MarketDataService : IMarketDataService
             {
                 _logger.LogWarning(ex, "[数据库缓存写入失败] Symbol={Symbol}，忽略（内存缓存已生效）", symbol);
             }
-            finally
-            {
-                _writeLock.Release();
-            }
         });
         
         return response;