diff --git a/AssetManager.API/Controllers/PortfolioController.cs b/AssetManager.API/Controllers/PortfolioController.cs
index 4a523a6..715eb16 100644
--- a/AssetManager.API/Controllers/PortfolioController.cs
+++ b/AssetManager.API/Controllers/PortfolioController.cs
@@ -358,6 +358,27 @@ public class PortfolioController : ControllerBase
                 });
             }
 
+            // 校验交易币种必须和组合本位币一致
+            var portfolio = _databaseService.GetDb().Queryable<Portfolio>().Where(p => p.Id == request.portfolioId && p.UserId == userId).First();
+            if (portfolio == null)
+            {
+                return NotFound(new ApiResponse<CreateTransactionResponse>
+                {
+                    code = AssetManager.Models.StatusCodes.NotFound,
+                    data = null,
+                    message = "投资组合不存在"
+                });
+            }
+            if (!string.IsNullOrEmpty(request.currency) && !request.currency.Equals(portfolio.Currency, StringComparison.OrdinalIgnoreCase))
+            {
+                return BadRequest(new ApiResponse<CreateTransactionResponse>
+                {
+                    code = AssetManager.Models.StatusCodes.BadRequest,
+                    data = null,
+                    message = $"该组合本位币为 {portfolio.Currency}，只能添加相同币种的标的"
+                });
+            }
+
             // 校验资产类型
             if (!string.IsNullOrEmpty(request.assetType))
             {
diff --git a/AssetManager.Services/PortfolioService.cs b/AssetManager.Services/PortfolioService.cs
index bcaf145..3ce4f24 100644
--- a/AssetManager.Services/PortfolioService.cs
+++ b/AssetManager.Services/PortfolioService.cs
@@ -365,6 +365,12 @@ public class PortfolioService : IPortfolioService
             throw new Exception("Portfolio not found or access denied");
         }
 
+        // 校验交易币种必须和组合本位币一致（双重校验）
+        if (!string.IsNullOrEmpty(request.currency) && !request.currency.Equals(portfolio.Currency, StringComparison.OrdinalIgnoreCase))
+        {
+            throw new Exception($"该组合本位币为 {portfolio.Currency}，只能添加相同币种的标的");
+        }
+
         // 卖出操作校验
         if (request.type?.ToLower() == "sell")
         {