Embodiments of the present invention relate to the communications field, and provide a method for transmitting data information, a base station, and user equipment, to improve utilization efficiency of a control message. The method includes: determining, by a base station, a carrier for sending data information, determining carrier indication information, and sending a control message corresponding to the data information to user equipment according to the carrier indication information, so that the user equipment receives the data information according to the control message. The method is used to transmit data information.