首先，你可以先检查一下你是否已经开启了Gzip压缩支持。
http://tool.itlearner.com/gzip/
开启Apache支持的操作如下：
1 登陆SHH
2 在SHH执行下列代码
chattr -V -i /etc/httpd/conf/httpd.conf;
echo ‘LoadModule deflate_module modules/mod_deflate.so’ >> /etc/httpd/conf/httpd.conf
echo ‘AddOutputFilterByType DEFLATE text/html text/php text/png text/jpg text/plain text/css text/xml text/javascript’ >> /etc/httpd/conf/httpd.conf
echo ‘DeflateCompressionLevel 9’ >> /etc/httpd/conf/httpd.conf
echo ‘SetOutputFilter DEFLATE’ >> /etc/httpd/conf/httpd.conf
chattr -V +i /etc/httpd/conf/httpd.conf;
service httpd restart;
这段代码是我用于Kloxo脚本的，个别情况可能不同，大家自己稍做修改。
或者SFTP打开/etc/httpd/conf/httpd.conf写入下列信息
LoadModule deflate_module modules/mod_deflate.so
AddOutputFilterByType DEFLATE text/html text/php text/png text/jpg text/plain text/css text/xml text/javascript
DeflateCompressionLevel 9
SetOutputFilter DEFLATE
然后重启Apache即可。
service httpd restart