Embodiments of the present invention provide a splitting method, a base station, and user equipment. The method in the present invention includes: sending, by a base station, an authentication indication to user equipment; acquiring, by the base station, an authentication status report indicating that the user equipment is admitted to the WLAN; and determining, by the base station according to the authentication status report, that the base station exchanges, with an access point of the WLAN, a first data stream of a data stream to be processed, where the data stream to be processed is a data stream that is to be sent by the base station to the user equipment or a data stream that is to be sent by the user equipment to the base station.