An uplink channel transmitting method, comprising: receiving, by a terminal device, uplink grant information transmitted by a network device, wherein the uplink grant information is used to indicate the terminal device to transmit a first uplink channel and a second uplink channel in a first time unit, wherein the first time unit is a short Transmission Time Interval, sTTI; and transmitting, by the terminal device, according to priority of uplink channel, at least one of the first uplink channel and the second uplink channel in the first time unit in case that total transmitting power for the terminal device to transmit the first uplink channel and the second uplink channel exceeds maximum transmitting power for the terminal device; wherein the priority of uplink channel from low to high comprises: an uplink channel without hybrid automatic repeat request-acknowledgement, HARQ-ACK and without a reference signal; an uplink channel without HARQ-ACK and with a reference signal and not sharing the reference signal, wherein the reference signal in the uplink channel not sharing the reference signal is not used to demodulate an uplink channel in a second time unit, and the uplink channel in the second time unit comprises HARQ-ACK and does not comprise the reference signal, and wherein the second time unit is one previous time unit adjacent to the first time unit; an uplink channel with HARQ-ACK and without a reference signal; an uplink channel without HARQ-ACK and with a reference signal and sharing the reference signal, wherein the reference signal in the uplink channel sharing the reference signal is used to demodulate the uplink channel in the second time unit; and an uplink channel with HARQ-ACK and with a reference signal. receiving, by a terminal device, uplink grant information transmitted by a network device, wherein the uplink grant information is used to indicate the terminal device to transmit a first uplink channel and a second uplink channel in a first time unit, wherein the first time unit is a short Transmission Time Interval, sTTI; and transmitting, by the terminal device, according to priority of uplink channel, at least one of the first uplink channel and the second uplink channel in the first time unit in case that total transmitting power for the terminal device to transmit the first uplink channel and the second uplink channel exceeds maximum transmitting power for the terminal device; wherein the priority of uplink channel from low to high comprises: an uplink channel without hybrid automatic repeat request-acknowledgement, HARQ-ACK and without a reference signal; an uplink channel without HARQ-ACK and with a reference signal and not sharing the reference signal, wherein the reference signal in the uplink channel not sharing the reference signal is not used to demodulate an uplink channel in a second time unit, and the uplink channel in the second time unit comprises HARQ-ACK and does not comprise the reference signal, and wherein the second time unit is one previous time unit adjacent to the first time unit; an uplink channel with HARQ-ACK and without a reference signal; an uplink channel without HARQ-ACK and with a reference signal and sharing the reference signal, wherein the reference signal in the uplink channel sharing the reference signal is used to demodulate the uplink channel in the second time unit; and an uplink channel with HARQ-ACK and with a reference signal. an uplink channel without hybrid automatic repeat request-acknowledgement, HARQ-ACK and without a reference signal; an uplink channel without HARQ-ACK and with a reference signal and not sharing the reference signal, wherein the reference signal in the uplink channel not sharing the reference signal is not used to demodulate an uplink channel in a second time unit, and the uplink channel in the second time unit comprises HARQ-ACK and does not comprise the reference signal, and wherein the second time unit is one previous time unit adjacent to the first time unit; an uplink channel with HARQ-ACK and without a reference signal; an uplink channel without HARQ-ACK and with a reference signal and sharing the reference signal, wherein the reference signal in the uplink channel sharing the reference signal is used to demodulate the uplink channel in the second time unit; and an uplink channel with HARQ-ACK and with a reference signal.