diff --git a/AssetManager.API/Controllers/TickerController.cs b/AssetManager.API/Controllers/TickerController.cs
index f7f174f..022c79e 100644
--- a/AssetManager.API/Controllers/TickerController.cs
+++ b/AssetManager.API/Controllers/TickerController.cs
@@ -1,9 +1,9 @@
-using AssetManager.Data;
 using AssetManager.Models;
+using AssetManager.Models.DTOs;
+using AssetManager.Services;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Logging;
-using SqlSugar;
 
 namespace AssetManager.API.Controllers;
 
@@ -16,18 +16,18 @@ namespace AssetManager.API.Controllers;
 public class TickerController : ControllerBase
 {
     private readonly ILogger<TickerController> _logger;
-    private readonly ISqlSugarClient _db;
+    private readonly ITickerService _tickerService;
 
-    public TickerController(ILogger<TickerController> logger, ISqlSugarClient db)
+    public TickerController(ILogger<TickerController> logger, ITickerService tickerService)
     {
         _logger = logger;
-        _db = db;
+        _tickerService = tickerService;
     }
 
     /// <summary>
     /// 模糊搜索股票代码
     /// </summary>
-    /// <param name="keyword">搜索关键词（ticker 或 exchange）</param>
+    /// <param name="keyword">搜索关键词（ticker 或 exchange 或 name）</param>
     /// <param name="limit">返回数量上限（默认 20）</param>
     /// <returns>匹配的股票代码列表</returns>
     [HttpGet("search")]
@@ -39,30 +39,7 @@ public class TickerController : ControllerBase
         {
             _logger.LogInformation($"Search ticker with keyword: {keyword}, limit: {limit}");
 
-            if (string.IsNullOrWhiteSpace(keyword))
-            {
-                return Ok(new ApiResponse<List<TickerSearchResult>>
-                {
-                    code = AssetManager.Models.StatusCodes.Success,
-                    data = new List<TickerSearchResult>(),
-                    message = "Keyword is empty"
-                });
-            }
-
-            // 模糊搜索：ticker 包含 keyword 或者 exchange 包含 keyword 或者 name 包含 keyword
-            var results = await _db.Queryable<TiingoTicker>()
-                .Where(t => t.Ticker.Contains(keyword) || t.Exchange.Contains(keyword) || (t.Name != null && t.Name.Contains(keyword)))
-                .Take(limit)
-                .OrderBy(t => t.Ticker)
-                .Select(t => new TickerSearchResult
-                {
-                    Ticker = t.Ticker,
-                    Name = t.Name,
-                    Exchange = t.Exchange,
-                    AssetType = t.AssetType,
-                    PriceCurrency = t.PriceCurrency
-                })
-                .ToListAsync();
+            var results = await _tickerService.SearchTickerAsync(keyword, limit);
 
             return Ok(new ApiResponse<List<TickerSearchResult>>
             {
@@ -84,15 +61,3 @@ public class TickerController : ControllerBase
         }
     }
 }
-
-/// <summary>
-/// 股票代码搜索结果
-/// </summary>
-public class TickerSearchResult
-{
-    public string? Ticker { get; set; }
-    public string? Name { get; set; }
-    public string? Exchange { get; set; }
-    public string? AssetType { get; set; }
-    public string? PriceCurrency { get; set; }
-}
diff --git a/AssetManager.API/Program.cs b/AssetManager.API/Program.cs
index f285134..058f981 100644
--- a/AssetManager.API/Program.cs
+++ b/AssetManager.API/Program.cs
@@ -68,6 +68,7 @@ builder.Services.AddScoped<AssetManager.Services.Services.WechatService>();
 builder.Services.AddScoped<AssetManager.Services.Services.JwtService>();
 builder.Services.AddScoped<AssetManager.Services.IPortfolioService, AssetManager.Services.PortfolioService>();
 builder.Services.AddScoped<AssetManager.Services.IStrategyService, AssetManager.Services.StrategyService>();
+builder.Services.AddScoped<AssetManager.Services.ITickerService, AssetManager.Services.TickerService>();
 
 // 市场数据服务：开发环境用 Mock，生产环境用 Alpaca
 if (builder.Environment.IsDevelopment())
diff --git a/AssetManager.Models/DTOs/TickerDTO.cs b/AssetManager.Models/DTOs/TickerDTO.cs
new file mode 100644
index 0000000..51152e1
--- /dev/null
+++ b/AssetManager.Models/DTOs/TickerDTO.cs
@@ -0,0 +1,13 @@
+namespace AssetManager.Models.DTOs;
+
+/// <summary>
+/// 股票代码搜索结果
+/// </summary>
+public class TickerSearchResult
+{
+    public string? Ticker { get; set; }
+    public string? Name { get; set; }
+    public string? Exchange { get; set; }
+    public string? AssetType { get; set; }
+    public string? PriceCurrency { get; set; }
+}
diff --git a/AssetManager.Services/ITickerService.cs b/AssetManager.Services/ITickerService.cs
new file mode 100644
index 0000000..416ec0a
--- /dev/null
+++ b/AssetManager.Services/ITickerService.cs
@@ -0,0 +1,17 @@
+using AssetManager.Models.DTOs;
+
+namespace AssetManager.Services;
+
+/// <summary>
+/// 股票代码服务接口
+/// </summary>
+public interface ITickerService
+{
+    /// <summary>
+    /// 模糊搜索股票代码
+    /// </summary>
+    /// <param name="keyword">搜索关键词</param>
+    /// <param name="limit">返回数量上限</param>
+    /// <returns>匹配的股票代码列表</returns>
+    Task<List<TickerSearchResult>> SearchTickerAsync(string keyword, int limit = 20);
+}
diff --git a/AssetManager.Services/TickerService.cs b/AssetManager.Services/TickerService.cs
new file mode 100644
index 0000000..f779840
--- /dev/null
+++ b/AssetManager.Services/TickerService.cs
@@ -0,0 +1,51 @@
+using AssetManager.Data;
+using AssetManager.Models.DTOs;
+using Microsoft.Extensions.Logging;
+using SqlSugar;
+
+namespace AssetManager.Services;
+
+/// <summary>
+/// 股票代码服务实现
+/// </summary>
+public class TickerService : ITickerService
+{
+    private readonly ILogger<TickerService> _logger;
+    private readonly ISqlSugarClient _db;
+
+    public TickerService(ILogger<TickerService> logger, ISqlSugarClient db)
+    {
+        _logger = logger;
+        _db = db;
+    }
+
+    /// <summary>
+    /// 模糊搜索股票代码
+    /// </summary>
+    public async Task<List<TickerSearchResult>> SearchTickerAsync(string keyword, int limit = 20)
+    {
+        _logger.LogInformation($"Search ticker with keyword: {keyword}, limit: {limit}");
+
+        if (string.IsNullOrWhiteSpace(keyword))
+        {
+            return new List<TickerSearchResult>();
+        }
+
+        // 模糊搜索：ticker 包含 keyword 或者 exchange 包含 keyword 或者 name 包含 keyword
+        var results = await _db.Queryable<TiingoTicker>()
+            .Where(t => t.Ticker.Contains(keyword) || t.Exchange.Contains(keyword) || (t.Name != null && t.Name.Contains(keyword)))
+            .Take(limit)
+            .OrderBy(t => t.Ticker)
+            .Select(t => new TickerSearchResult
+            {
+                Ticker = t.Ticker,
+                Name = t.Name,
+                Exchange = t.Exchange,
+                AssetType = t.AssetType,
+                PriceCurrency = t.PriceCurrency
+            })
+            .ToListAsync();
+
+        return results;
+    }
+}