diff --git a/gateway/scripts/ocg_router.py b/gateway/scripts/ocg_router.py
index 8a890c4..0b6fb03 100644
--- a/gateway/scripts/ocg_router.py
+++ b/gateway/scripts/ocg_router.py
@@ -495,13 +495,13 @@ class RouterHandler(BaseHTTPRequestHandler):
         allowed = {
             "content-type", "content-encoding", "cache-control",
             "x-request-id", "x-ratelimit-remaining", "x-ratelimit-reset",
-            "access-control-allow-origin", "transfer-encoding",
+            "access-control-allow-origin",
         }
+        # 注意：不转发 transfer-encoding: chunked — 代理已缓存整个响应，不是 chunked
         for k, v in headers.items():
             if k.lower() in allowed:
                 self.send_header(k, v)
-        if "transfer-encoding" not in {k.lower() for k in headers}:
-            self.send_header("Content-Length", str(len(body)))
+        self.send_header("Content-Length", str(len(body)))
         self.send_header("Access-Control-Allow-Origin", "*")
         self.end_headers()
         self.wfile.write(body)