A method for determining an uplink control information, UCI, field, comprising: receiving, by a terminal, at least two Hybrid Automatic Repeat reQuest-acknowledgement, HARQ-ACK, feedback configurations; and receiving, by the terminal, first downlink control information, DCI, a length of a first information-field in the first DCI being determined by the at least two HARQ-ACK feedback configurations, and the first information-field in the first DCI being a field related to uplink control feedback; wherein a first information received by the terminal is used for indicating a target HARQ-ACK feedback configuration corresponding to the first DCI, wherein the target HARQ-ACK feedback configuration is one of the at least two HARQ-ACK feedback configurations; and characterized in that: the first information-field comprises a downlink assignment index, DAI, field, if a PDSCH-HARQ-ACK-Codebook corresponding to the target HARQ-ACK feedback configuration is semi-static, information in the DAI field will not be parsed, or the information in the DAI field will be parsed into a meaning other than PDSCH allocation; and if the PDSCH-HARQ-ACK-Codebook corresponding to the target HARQ-ACK feedback configuration is dynamic, the information in the DAI field is parsed, and the information parsed is at least used for determining a HARQ-ACK mapping order in HARQ-ACK feedbacks. receiving, by a terminal, at least two Hybrid Automatic Repeat reQuest-acknowledgement, HARQ-ACK, feedback configurations; and receiving, by the terminal, first downlink control information, DCI, a length of a first information-field in the first DCI being determined by the at least two HARQ-ACK feedback configurations, and the first information-field in the first DCI being a field related to uplink control feedback; wherein a first information received by the terminal is used for indicating a target HARQ-ACK feedback configuration corresponding to the first DCI, wherein the target HARQ-ACK feedback configuration is one of the at least two HARQ-ACK feedback configurations; and characterized in that: the first information-field comprises a downlink assignment index, DAI, field, if a PDSCH-HARQ-ACK-Codebook corresponding to the target HARQ-ACK feedback configuration is semi-static, information in the DAI field will not be parsed, or the information in the DAI field will be parsed into a meaning other than PDSCH allocation; and if the PDSCH-HARQ-ACK-Codebook corresponding to the target HARQ-ACK feedback configuration is dynamic, the information in the DAI field is parsed, and the information parsed is at least used for determining a HARQ-ACK mapping order in HARQ-ACK feedbacks. the first information-field comprises a downlink assignment index, DAI, field, if a PDSCH-HARQ-ACK-Codebook corresponding to the target HARQ-ACK feedback configuration is semi-static, information in the DAI field will not be parsed, or the information in the DAI field will be parsed into a meaning other than PDSCH allocation; and if the PDSCH-HARQ-ACK-Codebook corresponding to the target HARQ-ACK feedback configuration is dynamic, the information in the DAI field is parsed, and the information parsed is at least used for determining a HARQ-ACK mapping order in HARQ-ACK feedbacks.