Provided in the present disclosure are a method and an apparatus for transmitting aperiodic channel state information CSI, a base station, and a terminal, the transmission method comprising: issuing at least two items of downlink control information DCI to a terminal, the hybrid automatic repeat request acknowledgement HARQ-ACK of the physical downlink shared channel PDSCH scheduled by the at least two DCI using the same physical uplink control channel PUCCH resources to implement feedback; if one DCI amongst the at least two DCI instructs the terminal to report aperiodic CSI, then the aperiodic CSI and HARQ-ACK use the same PUCCH resources to implement feedback, and the CSI trigger information field of DCI issued after the DCI instructing the terminal to report aperiodic CSI also instruct the terminal to report aperiodic CSI on the PUCCH resources.
METHOD AND APPARATUS FOR TRANSMITTING APERIODIC CHANNEL STATE INFORMATION CSI, BASE STATION, AND TERMINAL