diff --git a/nginx/yuheng.docker.conf.tpl b/nginx/yuheng.docker.conf.tpl
index 140c972..778cfbb 100644
--- a/nginx/yuheng.docker.conf.tpl
+++ b/nginx/yuheng.docker.conf.tpl
@@ -9,7 +9,7 @@ upstream yh_admin_upstream {
 server {
     listen 443 ssl;
     listen [::]:443 ssl;
-    http2 on;
+    # 不显式开启 http2（等同仅 HTTP/1.1），避免大分片 multipart 在 HTTP/2 下偶发断连
     server_name yuheng.yuxindazhineng.com;
     client_max_body_size 800m;
 
diff --git a/nginx/yuheng.host.conf b/nginx/yuheng.host.conf
index 09c95d9..973fd19 100644
--- a/nginx/yuheng.host.conf
+++ b/nginx/yuheng.host.conf
@@ -19,8 +19,9 @@ upstream yh_admin_upstream {
 }
 
 server {
-    listen 443 ssl http2;
-    listen [::]:443 ssl http2;
+    # 关闭 http2：大体积分片 multipart 在部分浏览器+HTTP/2 组合下易出现 ERR_HTTP2_PROTOCOL_ERROR / 网络面板 status 0
+    listen 443 ssl;
+    listen [::]:443 ssl;
     server_name yuheng.yuxindazhineng.com;
     client_max_body_size 800m;
 
diff --git a/nginx/yuheng.yuxindazhineng.com.conf b/nginx/yuheng.yuxindazhineng.com.conf
index 1670d00..5224496 100644
--- a/nginx/yuheng.yuxindazhineng.com.conf
+++ b/nginx/yuheng.yuxindazhineng.com.conf
@@ -13,8 +13,9 @@ server {
 
 # HTTPS：整站反代到 compose 内 Nginx（宿主机 443 → 127.0.0.1:8443）
 server {
-    listen 443 ssl http2;
-    listen [::]:443 ssl http2;
+    # 与 yuheng.host.conf 一致：大文件/分片上传在 HTTP/1.1 下更稳
+    listen 443 ssl;
+    listen [::]:443 ssl;
     server_name yuheng.yuxindazhineng.com;
 
     ssl_certificate     /etc/ssl/yh_web/yuheng.yuxindazhineng.com/fullchain.pem;