diff --git a/src/InterfaceForward.Api/Dockerfile b/src/InterfaceForward.Api/Dockerfile
index 75a7145..969c197 100644
--- a/src/InterfaceForward.Api/Dockerfile
+++ b/src/InterfaceForward.Api/Dockerfile
@@ -1,16 +1,24 @@
-FROM mcr.microsoft.com/dotnet/sdk:8.0.421 AS base
-ARG BUILD_CONFIGURATION=Release
+# ===== 阶段1: 基础依赖层（可缓存） =====
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
 WORKDIR /src
-COPY . /src
+
+# ✅ 关键优化：只复制 .csproj 文件，让 restore 层可以缓存
+COPY ["src/InterfaceForward.Api/InterfaceForward.Api.csproj", "src/InterfaceForward.Api/"]
 RUN dotnet restore "src/InterfaceForward.Api/InterfaceForward.Api.csproj"
+
+# ===== 阶段2: 构建层 =====
+# ✅ 现在才复制所有代码（这一层变动频繁，但 restore 已经跑完了）
+COPY . .
 WORKDIR "/src/src/InterfaceForward.Api"
+ARG BUILD_CONFIGURATION=Release
 RUN dotnet build "InterfaceForward.Api.csproj" -c $BUILD_CONFIGURATION -o /app/build
 
-FROM base AS publish
+# ===== 阶段3: 发布层 =====
+FROM build AS publish
 ARG BUILD_CONFIGURATION=Release
 RUN dotnet publish "InterfaceForward.Api.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false
 
-# 使用运行时镜像
+# ===== 阶段4: 最终运行时（轻量级） =====
 FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS runtime
 WORKDIR /app
 COPY --from=publish /app/publish .