I am very proud to share this problem with you !

thanks for your instructions.

virt-manager currently support xen,qemu-kvm,and the latest version support lxc.libvirt can connect openvz,and via virsh command tools can mananger openvz, but official does not claimed that virt-manager support openvz...perhaps virt-manager can support openvz in theory,but I do not kown how to modify or add to support openvz.