diff --git a/docker/Dockerfile b/docker/Dockerfile
index f747bcc..109ebba 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -9,7 +9,6 @@ ENV TZ=Asia/Shanghai \
     DEBIAN_FRONTEND=noninteractive \
     PYTHONUNBUFFERED=1 \
     PYTHONDONTWRITEBYTECODE=1 \
-    PYTHONPATH=/app:/app/vnpy_v4.4.0 \
     VNPY_LOG_LEVEL=INFO \
     TA_LIBRARY_PATH=/usr/local/lib \
     TA_INCLUDE_PATH=/usr/local/include
@@ -60,6 +59,10 @@ COPY sanguo_research/ /app/sanguo_research/
 COPY sanguo_data/ /app/sanguo_data/
 COPY sanguo_common/ /app/sanguo_common/
 
+# Python 路径(spawn 子进程继承 env 不继承 sys.path;放 COPY 后让 apt/TA-Lib/pip 层缓存命中,
+# 避免 sourceforge wget 卡——ENV 在前会导致其后所有层 cache miss 触发 TA-Lib 重编译)
+ENV PYTHONPATH=/app:/app/vnpy_v4.4.0
+
 # 复制启动脚本
 COPY entrypoint.sh /app/
 RUN chmod +x /app/entrypoint.sh