Embodiments of the present disclosure disclose a sequence signal sending method, to receive control information from a network-side device, to clarify a channel resource used by a terminal to send a sequence signal to the network-side device. The method in the embodiments of the present disclosure includes: receiving, by a terminal, control information sent by a network-side device, where the control information includes a sequence identifier and a channel resource indication, and the channel resource indication is used to indicate a channel resource available for the terminal; determining, by the terminal, a corresponding sequence signal based on the sequence identifier; and sending, by the terminal, the sequence signal by using the channel resource. Therefore, it is ensured that the terminal obtains stable and reliable communication quality and provides satisfactory user experience, and a performance requirement of a future network is fully met.