Shunt data transmission method, transmission apparatus and a user terminal

The present invention relates to communication technologies, and particularly relates to a data transmission method shunt, shunt data transmission device and a user terminal. Offloading data transmission method provided by the embodiment of the present invention, a terminal IP address and the physical address of a first network of a second network access module of the user terminal by acquiring the user; downlink service in a user terminal from a first network to a second shunt network, obtaining the address of the destination address is the IP address of a user terminal in a first network to a second IP packet encapsulation media access layer network packet format corresponding to the second network after transmission to the user terminal, and Since there is no change in IP address of the user application bindings, thus enabling downstream traffic seamlessly switch from a first network to a second network, users avoid the application of unnecessary interruptions and restart problems, enhance the user experience.