Embodiments of the present invention provide a method for controlling power of a carrier signal, user equipment, and a base station. The method includes: receiving, by user equipment, power control parameters, sent by at least one base station, of at least two carrier signals, where the at least two carrier signals are signals sent on at least two aggregation carriers; determining, by the user equipment according to the power control parameters, channel gain reference quantities corresponding to the at least two carrier signals, where the channel gain reference quantities are used to represent a magnitude of a channel gain; and controlling, by the user equipment, power of the at least two carrier signals according to the channel gain reference quantities. According to the technical solutions of the present invention, a power resource of user equipment can be effectively utilized, and network performance can be improved.