diff --git a/backend/Dockerfile b/backend/Dockerfile
index 4576a1f..3ef8ced 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,8 +1,9 @@
+# syntax=docker/dockerfile:1
 # ============================================================
-# AIOps Backend + Agent 多阶段 Dockerfile
+# AIOps Backend + Agent 多阶段 Dockerfile (BuildKit 加速版)
 # Stage 1: 编译后端 (Go 1.24)
 # Stage 2: 交叉编译 Agent (Go 1.24, linux-amd64/arm64 + darwin-arm64)
-# Stage 3: 运行时 (Alpine)
+# Stage 3: 运行时 (Alpine 3.20 固定版本)
 # 署名 Logan.Li
 # ============================================================
 
@@ -22,16 +23,23 @@ RUN apk add --no-cache git ca-certificates tzdata
 ENV TZ=Asia/Shanghai
 ENV GOPROXY=https://goproxy.cn,direct
 ENV GONOSUMCHECK=*
+ENV GOMODCACHE=/go/pkg/mod
+ENV GOCACHE=/root/.cache/go-build
 
 # 复制后端 go.mod（利用 Docker 层缓存）
 COPY backend/go.mod backend/go.sum ./
-RUN go mod download
+# --mount=type=cache 让 go mod download 的结果跨构建复用 // Logan.Li
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    go mod download
 
 # 复制后端源码
 COPY backend/ ./
 
-# 构建后端二进制（注入版本号）
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
+# 构建后端二进制（注入版本号）— cache mount 让增量编译极快
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
     -ldflags="-w -s -X main.Version=${VERSION} -X main.BuildTime=${BUILD_TIME}" \
     -o aiops ./cmd/
 
@@ -42,27 +50,37 @@ WORKDIR /agent
 
 ENV GOPROXY=https://goproxy.cn,direct
 ENV GOSUMDB=off
+ENV GOMODCACHE=/go/pkg/mod
+ENV GOCACHE=/root/.cache/go-build
 
 # 复制 agent go.mod
 COPY agent/go.mod agent/go.sum ./
-RUN go mod download
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    go mod download
 
 # 复制 agent 源码
 COPY agent/ ./
 
 # 交叉编译三个平台的 agent 二进制（注入版本号）
-RUN CGO_ENABLED=0 GOOS=linux  GOARCH=amd64 go build -ldflags="-s -w -X main.version=${VERSION} -X main.buildTime=${BUILD_TIME}" -o bin/aiops-agent-linux-amd64  . && \
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 GOOS=linux  GOARCH=amd64 go build -ldflags="-s -w -X main.version=${VERSION} -X main.buildTime=${BUILD_TIME}" -o bin/aiops-agent-linux-amd64  . && \
     CGO_ENABLED=0 GOOS=linux  GOARCH=arm64 go build -ldflags="-s -w -X main.version=${VERSION} -X main.buildTime=${BUILD_TIME}" -o bin/aiops-agent-linux-arm64  . && \
     CGO_ENABLED=0 GOOS=darwin GOARCH=arm64 go build -ldflags="-s -w -X main.version=${VERSION} -X main.buildTime=${BUILD_TIME}" -o bin/aiops-agent-darwin-arm64 .
 
 # ==================== Stage 3: Runtime ====================
-FROM alpine:latest
+# 固定版本避免 :latest 每次变动导致全量 cache 失效 // Logan.Li
+FROM alpine:3.20
 
 # 使用国内 Alpine 镜像源加速 // Logan.Li
 RUN sed -i 's|dl-cdn.alpinelinux.org|mirrors.aliyun.com|g' /etc/apk/repositories
 
-# 安装运行时依赖（bash=kubectl交互终端，curl=健康检查，openssh-client=SSH远程安装agent，kubectl=集群命令行管理，ansible=自动化运维，nodejs+npm=前端构建，maven=Java构建）
-RUN apk --no-cache add ca-certificates tzdata bash curl openssh-client ansible sshpass git docker-cli docker-cli-buildx nodejs npm maven && \
+# 安装运行时依赖（apk cache mount 加速重装）
+# bash=kubectl交互终端，curl=健康检查，openssh-client=SSH远程安装agent
+# kubectl=集群命令行管理，ansible=自动化运维，nodejs+npm=前端构建，maven=Java构建
+RUN --mount=type=cache,target=/var/cache/apk \
+    apk add ca-certificates tzdata bash curl openssh-client ansible sshpass git docker-cli docker-cli-buildx nodejs npm maven && \
     curl -sLO "https://dl.k8s.io/release/$(curl -sL https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" && \
     chmod +x kubectl && mv kubectl /usr/local/bin/
 
diff --git a/run.sh b/run.sh
index bd7c4e4..9d855bb 100755
--- a/run.sh
+++ b/run.sh
@@ -325,6 +325,11 @@ cmd_docker() {
     info "使用: $DOCKER_COMPOSE"
     info "版本: $VERSION (构建时间: $BUILD_TIME)"
 
+    # 启用 BuildKit 加速构建（cache mount 跨构建复用 go mod/apk 缓存）// Logan.Li
+    export DOCKER_BUILDKIT=1
+    export COMPOSE_DOCKER_CLI_BUILD=1
+    info "BuildKit: 已启用 (增量编译 + 缓存复用)"
+
     case "$action" in
         up)
             banner "========== Docker Compose 启动 =========="