A method for configuring gap, a terminal, and a network device are provided. The method for configuring gap in the embodiments of this application includes: sending, by a terminal, a first request to a network device, where the first request is used to request the network device to configure or reconfigure at least one gap, and the at least one gap is a gap related to a dual connectivity (DC) state; and receiving, by the terminal, gap configuration information sent by the network device, where the gap configuration information is used to configure or reconfigure the at least one gap.