A method for hybrid automatic repeat request acknowledgement, HARQ-ACK, feedback for a physical downlink control channel, PDCCH, without scheduling data, performed by a terminal, comprising: receiving, from a network device, a PDCCH that indicates secondary cell dormancy without scheduling data; determining, based on a reception time of a PDCCH that indicates secondary cell dormancy without scheduling data, a timeline of uplink control information, UCI, multiplexing HARQ-ACK feedback information of the PDCCH and other information; sending, according to the timeline of the UCI, the HARQ-ACK feedback information; characterized in that the determining, based on a reception time of a PDCCH that indicates secondary cell dormancy without scheduling data, a timeline of UCI multiplexing HARQ-ACK feedback information of the PDCCH and other information comprises: determining, based on a reception time of the last symbol for the PDCCH that indicates secondary cell dormancy without scheduling data and a second time interval, the timeline of the UCI multiplexing the HARQ-ACK feedback information of the PDCCH and the other information; wherein the second time interval is determined based on one or more of a quantity of sampling points of fast fourier transform, FFT, or inverse fast fourier transform, IFFT, a quantity of sampling points of cyclic prefix, CP, a sampling period, and a subcarrier spacing, SCS, of the PDCCH; wherein the other information includes at least one of the following: channel state information, CSI; scheduling request, SR; HARQ-ACK feedback for all feedbacks except the PDCCH that indicates secondary cell dormancy without scheduling data. receiving, from a network device, a PDCCH that indicates secondary cell dormancy without scheduling data; determining, based on a reception time of a PDCCH that indicates secondary cell dormancy without scheduling data, a timeline of uplink control information, UCI, multiplexing HARQ-ACK feedback information of the PDCCH and other information; sending, according to the timeline of the UCI, the HARQ-ACK feedback information; characterized in that the determining, based on a reception time of a PDCCH that indicates secondary cell dormancy without scheduling data, a timeline of UCI multiplexing HARQ-ACK feedback information of the PDCCH and other information comprises: determining, based on a reception time of the last symbol for the PDCCH that indicates secondary cell dormancy without scheduling data and a second time interval, the timeline of the UCI multiplexing the HARQ-ACK feedback information of the PDCCH and the other information; wherein the second time interval is determined based on one or more of a quantity of sampling points of fast fourier transform, FFT, or inverse fast fourier transform, IFFT, a quantity of sampling points of cyclic prefix, CP, a sampling period, and a subcarrier spacing, SCS, of the PDCCH; wherein the other information includes at least one of the following: channel state information, CSI; scheduling request, SR; HARQ-ACK feedback for all feedbacks except the PDCCH that indicates secondary cell dormancy without scheduling data. determining, based on a reception time of the last symbol for the PDCCH that indicates secondary cell dormancy without scheduling data and a second time interval, the timeline of the UCI multiplexing the HARQ-ACK feedback information of the PDCCH and the other information; wherein the second time interval is determined based on one or more of a quantity of sampling points of fast fourier transform, FFT, or inverse fast fourier transform, IFFT, a quantity of sampling points of cyclic prefix, CP, a sampling period, and a subcarrier spacing, SCS, of the PDCCH; wherein the other information includes at least one of the following: channel state information, CSI; scheduling request, SR; HARQ-ACK feedback for all feedbacks except the PDCCH that indicates secondary cell dormancy without scheduling data.