diff --git a/packages/services/docling-service/Dockerfile b/packages/services/docling-service/Dockerfile
index 8c56aa2..70d4e9d 100644
--- a/packages/services/docling-service/Dockerfile
+++ b/packages/services/docling-service/Dockerfile
@@ -12,8 +12,17 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 COPY app/ ./app/
 
-# 构建时预下载模型，避免首次请求延迟
-RUN python -c "from docling.document_converter import DocumentConverter; DocumentConverter()"
+# 构建时预下载模型（需要实际转换才会触发 HuggingFace 模型下载）
+RUN python -c "\
+import tempfile, os; \
+pdf = b'%PDF-1.4\n1 0 obj<</Type/Catalog/Pages 2 0 R>>endobj\n2 0 obj<</Type/Pages/Kids[3 0 R]/Count 1>>endobj\n3 0 obj<</Type/Page/MediaBox[0 0 612 792]/Parent 2 0 R/Contents 4 0 R/Resources<</Font<</F1 5 0 R>>>>>>endobj\n4 0 obj<</Length 44>>stream\nBT /F1 12 Tf 100 700 Td (hello) Tj ET\nendstream\nendobj\n5 0 obj<</Type/Font/Subtype/Type1/BaseFont/Helvetica>>endobj\nxref\n0 6\n0000000000 65535 f \n0000000009 00000 n \n0000000058 00000 n \n0000000115 00000 n \n0000000266 00000 n \n0000000360 00000 n \ntrailer<</Size 6/Root 1 0 R>>\nstartxref\n454\n%%EOF'; \
+f = tempfile.NamedTemporaryFile(suffix='.pdf', delete=False); f.write(pdf); f.close(); \
+from docling.document_converter import DocumentConverter; \
+conv = DocumentConverter(); \
+try: conv.convert(f.name) \
+except: pass \
+finally: os.unlink(f.name); \
+print('Models pre-downloaded successfully')"
 
 EXPOSE 3007