Provided are a method for transmitting data information, a base station and a user equipment, which relate to the field of communications and are used for increasing the usage efficiency of a control message. The method comprises: determining, by a base station, a carrier sending data information, and determining carrier indication information; and sending a control message corresponding to the data information to a user equipment according to the carrier indication information, so that the user equipment receives the data information according to the control message. The embodiment of the method is used for transmitting data information.