The invention discloses a method and device for sending and receiving uplink control information, and belongs to the technical field of communication. In this method, a terminal device may receive a first DCI from a network device, determines that the uplink shared channel scheduled by the first DCI is only used for sending the UCI according to the received first DCI and then sends the first UCI to the network equipment through the uplink shared channel scheduled by the first DCI; that is to say, the network equipment indicates the terminal equipment through the DCI; therefore, the terminal equipment can determine whether the uplink shared channel scheduled by the DCI is only used for sending the UCI or not according to the indication of the DCI, a mode of determining that the uplink shared channel scheduled by the network equipment is only used for sending the uplink control information is provided, and the interaction performance between the network equipment and the terminal equipment is enhanced.