The application discloses an ACK/NACK feedback method and an associated apparatus serving to resolve the problem arising from data in different transmission time intervals having different transmission and processing latencies, leading to different earliest time points to transmit an ACK/NACK feedback message, and subsequently resulting in being unable to ensure normal ACK/NACK feedback in downlink transmission. The method comprises: a terminal receives a first physical downlink control channel having downlink control information containing a first indication field, the first indication field indicating a time-domain position of ACK/NACK feedback message; and the terminal determines, according to the first indication field, the first physical downlink control channel or the time-domain position of the ACK/NACK feedback message of a first physical downlink shared channel corresponding to the first physical downlink control channel, and transmits, at the time-domain position of the ACK/NACK feedback message, the ACK/NACK feedback message.