Network virtualization technology allows multiple logical networks or network applications to run simultaneously on the underlying physical network. The virtual network mapping is the key method to realize network virtualization. Virtual tenant network (VTN) is a new technique for construction of multi-tenant network in software definition networking (SDN) network. VTN mapping mechanism is a core problem. In this paper MAC address-based mapping method which maps the host to the virtual network according to the host’s MAC address is proposed. Besides, a virtual network based on MAC address mapping method is established to verify the effectiveness of the VTN mapping method based on MAC address.