A feedback information processing method, comprising: receiving, by a terminal, signaling that is used to determine at least one carrier of N carriers, wherein N is a positive integer; and generating, by the terminal, a feedback information codebook, wherein the feedback information codebook comprises feedback information corresponding to all hybrid automatic repeat request, HARQ, processes within the at least one carrier of the N carriers, wherein the signaling comprises carrier indication information, an indication range of the carrier indication information comprises N-1 carriers, and the N-1 carriers refer to all carriers other than a first carrier in the N carriers, wherein the first carrier comprises one of the following: a carrier used for receiving the signaling; a carrier corresponding to a control resource set CORESET used for receiving the signaling, wherein downlink control information DCI transmitted in the CORESET is configured to schedule a physical channel in the first carrier; a carrier corresponding to a search space used for receiving the signaling, wherein downlink control information DCI transmitted in the search space is configured to schedule a physical channel in the first carrier; and a carrier receiving a first downlink channel, wherein the first downlink channel is a downlink channel that is scheduled for transmission by the signaling, wherein the feedback information codebook further comprises feedback information corresponding to a HARQ process carried by a physical downlink channel received within a first time period, and wherein the first time period is determined according to a time-domain starting position of a physical downlink channel carrying the signaling. receiving, by a terminal, signaling that is used to determine at least one carrier of N carriers, wherein N is a positive integer; and generating, by the terminal, a feedback information codebook, wherein the feedback information codebook comprises feedback information corresponding to all hybrid automatic repeat request, HARQ, processes within the at least one carrier of the N carriers, wherein the signaling comprises carrier indication information, an indication range of the carrier indication information comprises N-1 carriers, and the N-1 carriers refer to all carriers other than a first carrier in the N carriers, wherein the first carrier comprises one of the following: a carrier used for receiving the signaling; a carrier corresponding to a control resource set CORESET used for receiving the signaling, wherein downlink control information DCI transmitted in the CORESET is configured to schedule a physical channel in the first carrier; a carrier corresponding to a search space used for receiving the signaling, wherein downlink control information DCI transmitted in the search space is configured to schedule a physical channel in the first carrier; and a carrier receiving a first downlink channel, wherein the first downlink channel is a downlink channel that is scheduled for transmission by the signaling, wherein the feedback information codebook further comprises feedback information corresponding to a HARQ process carried by a physical downlink channel received within a first time period, and wherein the first time period is determined according to a time-domain starting position of a physical downlink channel carrying the signaling. a carrier used for receiving the signaling; a carrier corresponding to a control resource set CORESET used for receiving the signaling, wherein downlink control information DCI transmitted in the CORESET is configured to schedule a physical channel in the first carrier; a carrier corresponding to a search space used for receiving the signaling, wherein downlink control information DCI transmitted in the search space is configured to schedule a physical channel in the first carrier; and a carrier receiving a first downlink channel, wherein the first downlink channel is a downlink channel that is scheduled for transmission by the signaling, wherein the feedback information codebook further comprises feedback information corresponding to a HARQ process carried by a physical downlink channel received within a first time period, and wherein the first time period is determined according to a time-domain starting position of a physical downlink channel carrying the signaling.