A superposition coding method, comprising: generating a superposition coding signal according to bit data to be separately sent to at least two user equipments,UEs; sending notification signaling to at least one UE in the at least two UEs, wherein the notification signaling carries data selection information, and the data selection information is used for instructing the UE to acquire, from bit data demodulated from the superposition coding signal, at least one bit of data that is of a specific quantity and at a specific location as received data; and sending the superposition coding signal to the at least two UEs, characterized in that the sending notification signaling to at least one UE in the at least two UEs, wherein the notification signaling carries data selection information comprises: sending radio resource control, RRC, signaling to the at least two UEs, wherein the RRC signaling carries the data selection information; or sending downlink control information, DCI, to the at least two UEs, wherein the DCI carries the data selection information; or sending DCI to the at least two UEs, wherein cyclic redundancy check, CRC, information in the DCI is scrambled by using a scrambling code, and the scrambling code is used for indicating the data selection information; wherein the method further comprises: separately instructing the at least two UEs to select a respective demodulation scheme. generating a superposition coding signal according to bit data to be separately sent to at least two user equipments,UEs; sending notification signaling to at least one UE in the at least two UEs, wherein the notification signaling carries data selection information, and the data selection information is used for instructing the UE to acquire, from bit data demodulated from the superposition coding signal, at least one bit of data that is of a specific quantity and at a specific location as received data; and sending the superposition coding signal to the at least two UEs, characterized in that the sending notification signaling to at least one UE in the at least two UEs, wherein the notification signaling carries data selection information comprises: sending radio resource control, RRC, signaling to the at least two UEs, wherein the RRC signaling carries the data selection information; or sending downlink control information, DCI, to the at least two UEs, wherein the DCI carries the data selection information; or sending DCI to the at least two UEs, wherein cyclic redundancy check, CRC, information in the DCI is scrambled by using a scrambling code, and the scrambling code is used for indicating the data selection information; wherein the method further comprises: separately instructing the at least two UEs to select a respective demodulation scheme. sending radio resource control, RRC, signaling to the at least two UEs, wherein the RRC signaling carries the data selection information; or sending downlink control information, DCI, to the at least two UEs, wherein the DCI carries the data selection information; or sending DCI to the at least two UEs, wherein cyclic redundancy check, CRC, information in the DCI is scrambled by using a scrambling code, and the scrambling code is used for indicating the data selection information; wherein the method further comprises: separately instructing the at least two UEs to select a respective demodulation scheme.