A feedback information transmission method applied to a terminal device, wherein the method comprises: in the case of receiving at least two physical downlink control channels PDCCHs sent by at least two transmission reception points TRPs or different antenna panels of one TRP, determining (S21) a target physical uplink control channel PUCCH resource, and sending (S22) target feedback information by using the target PUCCH resource, wherein the target feedback information is feedback information of each physical downlink shared channel PDSCH scheduled by the at least two PDCCHs; wherein in the case that the target PUCCH resource comprises one PUCCH resource, the determining a target PUCCH resource comprises: sorting (S31) DCI in a first downlink control information DCI set according to a PDCCH monitoring occasion, a serving cell index, and a TRP identifier; determining (S32) the target PUCCH resource according to a first target DCI and a quantity of target feedback information bits; wherein the first DCI set is DCI carried by the at least two PDCCHs, the first target DCI is DCI ranked last in the first DCI set, the PDCCH monitoring occasion is a monitoring occasion of a PDCCH carrying the DCI, the serving cell index is an index of a serving cell wherein a PDSCH scheduled through the DCI is located, and the TRP identifier is an identifier of a TRP corresponding to the DCI or an identifier of a TRP corresponding to a PDSCH scheduled through the DCI. in the case of receiving at least two physical downlink control channels PDCCHs sent by at least two transmission reception points TRPs or different antenna panels of one TRP, determining (S21) a target physical uplink control channel PUCCH resource, and sending (S22) target feedback information by using the target PUCCH resource, wherein the target feedback information is feedback information of each physical downlink shared channel PDSCH scheduled by the at least two PDCCHs; wherein in the case that the target PUCCH resource comprises one PUCCH resource, the determining a target PUCCH resource comprises: sorting (S31) DCI in a first downlink control information DCI set according to a PDCCH monitoring occasion, a serving cell index, and a TRP identifier; determining (S32) the target PUCCH resource according to a first target DCI and a quantity of target feedback information bits; wherein the first DCI set is DCI carried by the at least two PDCCHs, the first target DCI is DCI ranked last in the first DCI set, the PDCCH monitoring occasion is a monitoring occasion of a PDCCH carrying the DCI, the serving cell index is an index of a serving cell wherein a PDSCH scheduled through the DCI is located, and the TRP identifier is an identifier of a TRP corresponding to the DCI or an identifier of a TRP corresponding to a PDSCH scheduled through the DCI. sorting (S31) DCI in a first downlink control information DCI set according to a PDCCH monitoring occasion, a serving cell index, and a TRP identifier; determining (S32) the target PUCCH resource according to a first target DCI and a quantity of target feedback information bits; wherein the first DCI set is DCI carried by the at least two PDCCHs, the first target DCI is DCI ranked last in the first DCI set, the PDCCH monitoring occasion is a monitoring occasion of a PDCCH carrying the DCI, the serving cell index is an index of a serving cell wherein a PDSCH scheduled through the DCI is located, and the TRP identifier is an identifier of a TRP corresponding to the DCI or an identifier of a TRP corresponding to a PDSCH scheduled through the DCI. <EOS>