diff --git a/API_CONTACTS.md b/API_CONTACTS.md
index 84441ec..3e5dbc9 100644
--- a/API_CONTACTS.md
+++ b/API_CONTACTS.md
@@ -123,7 +123,7 @@ GET /api/contacts/export?search=产品经理&start_date=2024-01-01&end_date=2024
   "code": 200,
   "msg": "success",
   "data": {
-    "download_url": "/media/exports/contacts_export_20240304_153045_a1b2c3d4.xlsx",
+    "download_url": "http://127.0.0.1:8000/media/exports/contacts_export_20240304_153045_a1b2c3d4.xlsx",
     "filename": "contacts_export_20240304_153045_a1b2c3d4.xlsx",
     "total_records": 150,
     "generated_at": "2024-03-04 15:30:45"
@@ -135,7 +135,7 @@ GET /api/contacts/export?search=产品经理&start_date=2024-01-01&end_date=2024
 
 | 字段名 | 类型 | 说明 |
 |--------|------|------|
-| download_url | string | 文件下载链接（相对路径） |
+| download_url | string | 文件下载链接（完整 URL） |
 | filename | string | 生成的文件名 |
 | total_records | integer | 导出的记录总数 |
 | generated_at | string | 文件生成时间 |
@@ -313,6 +313,5 @@ const handleExport = async () => {
    - token 格式：`Bearer <token>`
 
 6. **下载链接**：
-   - 返回的 `download_url` 是相对路径
-   - 前端需要拼接完整的服务器地址（如果跨域）
-   - 或直接使用相对路径（如果同域）
+   - 返回的 `download_url` 是可直接访问的完整下载 URL
+   - 前端可直接 `window.open(download_url)` 或 `a.href = download_url` 下载
diff --git a/server/api/contacts.py b/server/api/contacts.py
index 3cc14a5..6e0b041 100644
--- a/server/api/contacts.py
+++ b/server/api/contacts.py
@@ -27,6 +27,14 @@ from server.models import ContactRecord
 from server.serializers import ContactRecordSerializer
 
 
+def _normalize_media_url(media_url: str) -> str:
+    """Normalize MEDIA_URL so it always ends with '/' and is safe for URL拼接."""
+    media_url = (media_url or "/media/").strip()
+    if media_url.startswith(("http://", "https://")):
+        return f"{media_url.rstrip('/')}/"
+    return f"/{media_url.strip('/')}/"
+
+
 @api_view(["GET", "POST"])
 def contact_list(request):
     if request.method == "GET":
@@ -187,8 +195,10 @@ def contact_export(request):
     # 保存文件
     wb.save(filepath)
 
-    # 生成下载链接
-    download_url = f"{settings.MEDIA_URL}exports/{filename}"
+    # 生成下载链接（始终返回可直接访问的完整 URL）
+    media_url = _normalize_media_url(getattr(settings, "MEDIA_URL", "/media/"))
+    download_path = f"{media_url}exports/{filename}"
+    download_url = request.build_absolute_uri(download_path)
 
     return api_success({
         "download_url": download_url,