The invention provides a data forwarding device, which is based on network function virtualization, and comprises an address resolution receiving module, an address resolution processing module, an address resolution storage module and an address resolution transmitting module. The address resolution receiving module is configured to receive an address query request transmitted by a client and/or an address resolution item transmitted by an address resolution server; the address resolution processing module is configured to judge whether the address resolution storage module stores the address resolution item to be queried by the address query request transmitted by the client and/or the address resolution item transmitted by the address resolution server; the address resolution storage module is configured to store the address resolution item when the address resolution item transmitted by the address resolution server is not stored yet according to a judgment result of the address resolution processing module; and the address resolution transmitting module is configured to transmit the address resolution item to the client. The invention further provides a data forwarding method.