Operators are re-architecting the network by introducing IT genes to confront the competition from Internet companies. Re-architecting core network is the breakthrough point of the whole network’s process

and NFV（Network Functions Virtualization） is the important means to realize it. The background of rearchitecting core network based on NFV is analyzed firstly. The target architecture of core network and the related key technologies are introduced. Finally

the relevant strategies to re-architect core network are discussed.