Embodiments of the present invention relate to a method and an apparatus for feeding back a CSI-RS resource combination, a user equipment, and a base station. The method includes: acquiring information of a CSI-RS resource combination; determining a candidate CSI-RS resource combination according to the information of the CSI-RS resource combination, and performing a joint CSI measurement according to one or more sets of CSI-RS resources in the candidate CSI-RS resource combination, so as to select a CSI-RS resource combination according to a measurement result of the joint CSI measurement; and feeding back the selected CSI-RS resource combination and the measurement result of the joint CSI measurement corresponding to the selected CSI-RS resource combination to a base station.