我找到解决办法了
还要修改nginx.conf
nano /etc/nginx/conf.d/default.conf
# HTTPS server
server {
listen 443 ssl http2 ;
server_name
http://www.tielemao.com;charset utf-8;
root/www/wordpress;
indexindex.php index.html;
client_max_body_size5m; # 这里添加此行,允许请求体大小最大不超过5m(超过你自己设置的大小)