你試著重新配置下yum repos
vi /etc/yum.repos.d/CentOs-Base.repo
[base]
name=CentOS-$releasever - Base
mirrorlist=
http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os#baseurl=
http://mirror.centos.org/centos/$releasever/os/$basearch/gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#released updates
[updates]
name=CentOS-$releasever - Updates
mirrorlist=
http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates#baseurl=
http://mirror.centos.org/centos/$releasever/updates/$basearch/gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
mirrorlist=
http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras#baseurl=
http://mirror.centos.org/centos/$releasever/extras/$basearch/gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
mirrorlist=
http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus#baseurl=
http://mirror.centos.org/centos/$releasever/centosplus/$basearch/gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
mirrorlist=
http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib#baseurl=
http://mirror.centos.org/centos/$releasever/contrib/$basearch/gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
以上是我的配置,僅供參考!