A wireless communications method, comprising: receiving, by a terminal device, at least one piece of downlink control information, DCI; characterized in that the method further comprises: determining, by the terminal device, a plurality of uplink channels transmitted within a target time unit, wherein the plurality of uplink channels at least partially overlap in time domain, and the at least one piece of DCI is used for indicating at least one uplink channel of the plurality of uplink channels; and multiplexing, by the terminal device responsive to determining that the plurality of uplink channels fulfill a constraint condition, information carried in the plurality of uplink channels in one channel within the target time unit for transmission, wherein the constraint condition comprises: a first symbol of an earliest uplink channel of the plurality of uplink channels is not before an A th symbol after a last symbol of a physical downlink control channel, PDCCH carrying the at least one piece of DCI, wherein A is a non-negative integer, wherein the plurality of uplink channels comprise at least one physical uplink control channel, PUCCH, carrying acknowledgement/negative-acknowledgement, ACK/NACK, corresponding to a target physical downlink shared channel, PDSCH; wherein the constraint condition further comprises: the first symbol of the earliest uplink channel of the plurality of uplink channels is not before a B th symbol after a last symbol of the target PDSCH, wherein B is a non-negative integer, and wherein B=N1+1+d 1,2, where N1 is a PDSCH processing time, and a value of d 1,2 is related to a PDSCH mapping manner. receiving, by a terminal device, at least one piece of downlink control information, DCI; characterized in that the method further comprises: determining, by the terminal device, a plurality of uplink channels transmitted within a target time unit, wherein the plurality of uplink channels at least partially overlap in time domain, and the at least one piece of DCI is used for indicating at least one uplink channel of the plurality of uplink channels; and multiplexing, by the terminal device responsive to determining that the plurality of uplink channels fulfill a constraint condition, information carried in the plurality of uplink channels in one channel within the target time unit for transmission, wherein the constraint condition comprises: a first symbol of an earliest uplink channel of the plurality of uplink channels is not before an A th symbol after a last symbol of a physical downlink control channel, PDCCH carrying the at least one piece of DCI, wherein A is a non-negative integer, wherein the plurality of uplink channels comprise at least one physical uplink control channel, PUCCH, carrying acknowledgement/negative-acknowledgement, ACK/NACK, corresponding to a target physical downlink shared channel, PDSCH; wherein the constraint condition further comprises: the first symbol of the earliest uplink channel of the plurality of uplink channels is not before a B th symbol after a last symbol of the target PDSCH, wherein B is a non-negative integer, and wherein B=N1+1+d 1,2, where N1 is a PDSCH processing time, and a value of d 1,2 is related to a PDSCH mapping manner. determining, by the terminal device, a plurality of uplink channels transmitted within a target time unit, wherein the plurality of uplink channels at least partially overlap in time domain, and the at least one piece of DCI is used for indicating at least one uplink channel of the plurality of uplink channels; and multiplexing, by the terminal device responsive to determining that the plurality of uplink channels fulfill a constraint condition, information carried in the plurality of uplink channels in one channel within the target time unit for transmission, wherein the constraint condition comprises: a first symbol of an earliest uplink channel of the plurality of uplink channels is not before an A th symbol after a last symbol of a physical downlink control channel, PDCCH carrying the at least one piece of DCI, wherein A is a non-negative integer, wherein the plurality of uplink channels comprise at least one physical uplink control channel, PUCCH, carrying acknowledgement/negative-acknowledgement, ACK/NACK, corresponding to a target physical downlink shared channel, PDSCH; wherein the constraint condition further comprises: the first symbol of the earliest uplink channel of the plurality of uplink channels is not before a B th symbol after a last symbol of the target PDSCH, wherein B is a non-negative integer, and wherein B=N1+1+d 1,2, where N1 is a PDSCH processing time, and a value of d 1,2 is related to a PDSCH mapping manner. a first symbol of an earliest uplink channel of the plurality of uplink channels is not before an A th symbol after a last symbol of a physical downlink control channel, PDCCH carrying the at least one piece of DCI, wherein A is a non-negative integer, wherein the plurality of uplink channels comprise at least one physical uplink control channel, PUCCH, carrying acknowledgement/negative-acknowledgement, ACK/NACK, corresponding to a target physical downlink shared channel, PDSCH; wherein the constraint condition further comprises: the first symbol of the earliest uplink channel of the plurality of uplink channels is not before a B th symbol after a last symbol of the target PDSCH, wherein B is a non-negative integer, and wherein B=N1+1+d 1,2, where N1 is a PDSCH processing time, and a value of d 1,2 is related to a PDSCH mapping manner.