diff --git a/AssetManager.Infrastructure/Services/MarketDataService.cs b/AssetManager.Infrastructure/Services/MarketDataService.cs
index ec0284b..4b1d40e 100644
--- a/AssetManager.Infrastructure/Services/MarketDataService.cs
+++ b/AssetManager.Infrastructure/Services/MarketDataService.cs
@@ -39,7 +39,7 @@ public class MarketDataService : IMarketDataService
     }
 
     /// <summary>
-    /// 获取股票实时价格（使用东方财富接口，免费无限制，返回实际交易价格，和券商一致）
+    /// 获取股票实时价格（使用腾讯财经接口，免费无限制，支持盘前盘后）
     /// </summary>
     /// <param name="symbol">股票代码</param>
     /// <returns>股票价格信息</returns>
@@ -47,22 +47,36 @@ public class MarketDataService : IMarketDataService
     {
         try
         {
-            _logger.LogInformation($"Requesting stock price for symbol: {symbol} (东方财富接口)");
+            _logger.LogInformation($"Requesting stock price for symbol: {symbol} (腾讯财经接口)");
 
-            // 东方财富美股接口：secid=105.代码，105代表美股
-            var url = $"https://push2.eastmoney.com/api/qt/stock/get?secid=105.{symbol.ToUpper()}&ut=fa5fd1943c7b386f172d6893dbfba10b&fields=f43,f60&np=1&fltt=2&invt=2";
-            var response = await _httpClient.GetFromJsonAsync<EastMoneyStockResponse>(url);
+            // 腾讯财经美股接口：前缀us，大写代码
+            var url = $"http://qt.gtimg.cn/q=us{symbol.ToUpper()}";
+            var response = await _httpClient.GetStringAsync(url);
 
-            if (response?.data == null || response.data.f43 <= 0)
+            if (string.IsNullOrEmpty(response) || !response.Contains("~"))
             {
-                throw new Exception($"东方财富接口返回无效数据，标的: {symbol}");
+                throw new Exception($"腾讯财经接口返回无效数据，标的: {symbol}");
             }
 
-            // 提取字段：f43=最新价 f60=昨收价，单位都是分，转成元
-            var currentPrice = response.data.f43 / 100m;
-            var prevClose = response.data.f60 / 100m;
+            // 解析返回数据
+            var parts = response.Split('"')[1].Split('~');
+            if (parts.Length < 36)
+            {
+                throw new Exception($"腾讯财经返回字段不足，标的: {symbol}");
+            }
+
+            // 提取字段：[3]=最新价 [4]=昨收价
+            if (!decimal.TryParse(parts[3], out var currentPrice) || currentPrice <= 0)
+            {
+                throw new Exception($"解析最新价失败，标的: {symbol}，返回值: {parts[3]}");
+            }
+
+            if (!decimal.TryParse(parts[4], out var prevClose) || prevClose <= 0)
+            {
+                prevClose = currentPrice; // 解析失败用当前价当昨收
+            }
             
-            _logger.LogDebug("东方财富接口返回 {Symbol}：最新价 {CurrentPrice}，昨收价 {PrevClose}，涨跌额 {Change}", 
+            _logger.LogDebug("腾讯财经接口返回 {Symbol}：最新价 {CurrentPrice}，昨收价 {PrevClose}，涨跌额 {Change}", 
                 symbol, currentPrice, prevClose, currentPrice - prevClose);
 
             return new MarketPriceResponse
@@ -76,35 +90,12 @@ public class MarketDataService : IMarketDataService
         }
         catch (Exception ex)
         {
-            _logger.LogError(ex, $"东方财富接口获取价格失败，标的: {symbol}，降级使用Tiingo接口");
+            _logger.LogError(ex, $"腾讯财经接口获取价格失败，标的: {symbol}，降级使用Tiingo接口");
             // 降级使用Tiingo接口
             return await GetStockPriceFromTiingoAsync(symbol);
         }
     }
 
-    /// <summary>
-    /// 东方财富美股接口响应模型
-    /// </summary>
-    internal class EastMoneyStockResponse
-    {
-        public EastMoneyStockData? data { get; set; }
-        public int rc { get; set; }
-        public string? msg { get; set; }
-    }
-
-    internal class EastMoneyStockData
-    {
-        /// <summary>
-        /// 最新价（单位：分）
-        /// </summary>
-        public decimal f43 { get; set; }
-        
-        /// <summary>
-        /// 昨收价（单位：分）
-        /// </summary>
-        public decimal f60 { get; set; }
-    }
-
     /// <summary>
     /// 从Tiingo获取股票价格（降级用）
     /// </summary>