Embodiments of the present disclosure disclose a channel quality indicator (CQI) feedback method, user equipment, and a network device. The method includes: receiving, by the user equipment, a secondary pilot receive signal of each single sector and that is obtained after a secondary pilot transmit signal of each single sector transmitted by a network device is transmitted by using a radio channel; estimating, by the user equipment, a channel matrix according to the secondary pilot receive signal of each single sector and the pre-known secondary pilot transmit signal of each single sector; estimating, by the user equipment, a CQI of each single sector according to the channel matrix and a first precoding matrix, and estimating a CQI of each joint sector according to the channel matrix and a second precoding matrix; and feeding back, by the user equipment, each CQI to the network device.