A data transmission method, comprising: receiving, a P th piece of hybrid automatic repeat request, HARQ, process data sent by a data transmit end at an N th moment, wherein P is a positive integer greater than or equal to 1, and N is a positive integer greater than or equal to 1; and sending, to the data transmit end at an M th moment, hybrid automatic repeat request-acknowledgment, HARQ-ACK, information corresponding to Q pieces of HARQ process data, wherein the HARQ-ACK information corresponding to the Q pieces of HARQ process data is a feedback corresponding to HARQ process data whose HARQ-ACK information is not sent to the data transmit end before the M th moment, the HARQ-ACK information corresponding to the Q pieces of HARQ process data comprises a P th piece of HARQ-ACK information corresponding to the P th piece of HARQ process data, and M is a positive integer greater than N; characterized in that the method further comprising: before the sending, to the data transmit end at an M th moment, HARQ-ACK information corresponding to Q pieces of HARQ process data, receiving an HARQ-ACK information transmission resource set configured by the data transmit end for all HARQ process data, wherein each piece of HARQ process data corresponds to one HARQ-ACK information transmission resource; and wherein the sending, to the data transmit end at an M th moment, HARQ-ACK information corresponding to Q pieces of HARQ process data comprises: sending, to the data transmit end, the HARQ-ACK information corresponding to the Q pieces of HARQ process data at the M th moment and on Q HARQ-ACK information transmission resources corresponding to the Q pieces of HARQ process data. receiving, a P th piece of hybrid automatic repeat request, HARQ, process data sent by a data transmit end at an N th moment, wherein P is a positive integer greater than or equal to 1, and N is a positive integer greater than or equal to 1; and sending, to the data transmit end at an M th moment, hybrid automatic repeat request-acknowledgment, HARQ-ACK, information corresponding to Q pieces of HARQ process data, wherein the HARQ-ACK information corresponding to the Q pieces of HARQ process data is a feedback corresponding to HARQ process data whose HARQ-ACK information is not sent to the data transmit end before the M th moment, the HARQ-ACK information corresponding to the Q pieces of HARQ process data comprises a P th piece of HARQ-ACK information corresponding to the P th piece of HARQ process data, and M is a positive integer greater than N; characterized in that the method further comprising: before the sending, to the data transmit end at an M th moment, HARQ-ACK information corresponding to Q pieces of HARQ process data, receiving an HARQ-ACK information transmission resource set configured by the data transmit end for all HARQ process data, wherein each piece of HARQ process data corresponds to one HARQ-ACK information transmission resource; and wherein the sending, to the data transmit end at an M th moment, HARQ-ACK information corresponding to Q pieces of HARQ process data comprises: sending, to the data transmit end, the HARQ-ACK information corresponding to the Q pieces of HARQ process data at the M th moment and on Q HARQ-ACK information transmission resources corresponding to the Q pieces of HARQ process data. before the sending, to the data transmit end at an M th moment, HARQ-ACK information corresponding to Q pieces of HARQ process data, receiving an HARQ-ACK information transmission resource set configured by the data transmit end for all HARQ process data, wherein each piece of HARQ process data corresponds to one HARQ-ACK information transmission resource; and wherein the sending, to the data transmit end at an M th moment, HARQ-ACK information corresponding to Q pieces of HARQ process data comprises: sending, to the data transmit end, the HARQ-ACK information corresponding to the Q pieces of HARQ process data at the M th moment and on Q HARQ-ACK information transmission resources corresponding to the Q pieces of HARQ process data.