Disclosed is an interface switching method and device, which relates to the field of communications and solves the problem of affecting the data transmission efficiency due to an undue interface selection. The method includes: an abstraction layer selecting or switching an interface or interface group used for transmitting data based on a forwarding rule matching the data. The technical solution provided by the embodiments of the present document is applicable to a home network, achieving a mechanism in which the abstraction layer of a multi-media home network device intelligently selects or switches the interface for data transmission according to information such as the link quality.