A method of sending an uplink control channel and a device thereof, a method of receiving an uplink control channel and a device thereof, a terminal and a base station are provided. The method of sending an uplink control channel includes: determining a plurality of target slots for sending uplink control information to be fed back, where the uplink control information to be fed back is sent in the target slots through an uplink control channel; acquiring a transmission duration or format of the uplink control channel carrying the uplink control information to be fed back in each of the target slots, where the transmission duration or format of the uplink control channel in every target slot is the same; and sending the uplink control channel carrying the uplink control information to be fed back in each of the target slots, according to the determined transmission duration or format of the uplink control channel.