diff --git a/backend/api-gateway/nginx/install-mpc-grpc.sh b/backend/api-gateway/nginx/install-mpc-grpc.sh
index 774f84f8..6f19274a 100644
--- a/backend/api-gateway/nginx/install-mpc-grpc.sh
+++ b/backend/api-gateway/nginx/install-mpc-grpc.sh
@@ -17,6 +17,7 @@
 set -e
 
 DOMAIN="mpc-grpc.szaiai.com"
+DOMAIN_CONF="${DOMAIN}.conf"  # Nginx 配置文件需要 .conf 后缀
 EMAIL="admin@szaiai.com"
 BACKEND_HOST="192.168.1.111"
 BACKEND_PORT="50051"
@@ -73,8 +74,8 @@ configure_http() {
     mkdir -p /var/www/certbot/.well-known/acme-challenge
     chmod -R 755 /var/www/certbot
 
-    # 创建临时 HTTP 配置
-    cat > /etc/nginx/sites-available/$DOMAIN << EOF
+    # 创建临时 HTTP 配置 (使用 .conf 后缀以便 nginx 加载)
+    cat > /etc/nginx/sites-available/$DOMAIN_CONF << EOF
 # 临时 HTTP 配置 - 用于 Let's Encrypt 验证
 server {
     listen 80;
@@ -94,7 +95,7 @@ server {
 EOF
 
     # 启用站点
-    ln -sf /etc/nginx/sites-available/$DOMAIN /etc/nginx/sites-enabled/
+    ln -sf /etc/nginx/sites-available/$DOMAIN_CONF /etc/nginx/sites-enabled/$DOMAIN_CONF
 
     # 测试并重载
     nginx -t && systemctl reload nginx
@@ -131,7 +132,7 @@ configure_grpc() {
     SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
     # 复制 gRPC 配置
-    cp "$SCRIPT_DIR/mpc-grpc.szaiai.com.conf" /etc/nginx/sites-available/$DOMAIN
+    cp "$SCRIPT_DIR/mpc-grpc.szaiai.com.conf" /etc/nginx/sites-available/$DOMAIN_CONF
 
     # 测试并重载
     nginx -t && systemctl reload nginx
@@ -214,7 +215,9 @@ show_help() {
 uninstall() {
     log_info "卸载 MPC gRPC 代理配置..."
 
-    # 移除站点配置
+    # 移除站点配置 (兼容新旧文件名)
+    rm -f /etc/nginx/sites-enabled/$DOMAIN_CONF
+    rm -f /etc/nginx/sites-available/$DOMAIN_CONF
     rm -f /etc/nginx/sites-enabled/$DOMAIN
     rm -f /etc/nginx/sites-available/$DOMAIN