An uplink reference signal sending method, comprising: receiving, by a terminal device, signaling sent by an access network device; determining, by the terminal device, a sequence type of an uplink reference signal based on the signaling; determining, by the terminal device, transmit power of the uplink reference signal based on the sequence type of the uplink reference signal, wherein the determining the transmit power of the uplink reference signal comprises: determining, by the terminal device, initial power of the uplink reference signal based on a power parameter configured by the access network device, wherein the power parameter comprises a parameter used to indicate a power offset, and the sequence type of the uplink reference signal is used to adjust the power offset, and selecting a smaller power from the initial power and an uplink transmit power threshold as the transmit power of the uplink reference signal; or determining, by the terminal device, the initial power of the uplink reference signal based on the power parameter configured by the access network device, wherein the sequence type of the uplink reference signal is used to adjust the initial power of the uplink reference signal, and selecting a smaller power from the adjusted initial power of the uplink reference signal and the uplink transmit power threshold as the transmit power of the uplink reference signal; and sending, by the terminal device, the uplink reference signal by using the transmit power of the uplink reference signal. receiving, by a terminal device, signaling sent by an access network device; determining, by the terminal device, a sequence type of an uplink reference signal based on the signaling; determining, by the terminal device, transmit power of the uplink reference signal based on the sequence type of the uplink reference signal, wherein the determining the transmit power of the uplink reference signal comprises: determining, by the terminal device, initial power of the uplink reference signal based on a power parameter configured by the access network device, wherein the power parameter comprises a parameter used to indicate a power offset, and the sequence type of the uplink reference signal is used to adjust the power offset, and selecting a smaller power from the initial power and an uplink transmit power threshold as the transmit power of the uplink reference signal; or determining, by the terminal device, the initial power of the uplink reference signal based on the power parameter configured by the access network device, wherein the sequence type of the uplink reference signal is used to adjust the initial power of the uplink reference signal, and selecting a smaller power from the adjusted initial power of the uplink reference signal and the uplink transmit power threshold as the transmit power of the uplink reference signal; and sending, by the terminal device, the uplink reference signal by using the transmit power of the uplink reference signal. determining, by the terminal device, initial power of the uplink reference signal based on a power parameter configured by the access network device, wherein the power parameter comprises a parameter used to indicate a power offset, and the sequence type of the uplink reference signal is used to adjust the power offset, and selecting a smaller power from the initial power and an uplink transmit power threshold as the transmit power of the uplink reference signal; or determining, by the terminal device, the initial power of the uplink reference signal based on the power parameter configured by the access network device, wherein the sequence type of the uplink reference signal is used to adjust the initial power of the uplink reference signal, and selecting a smaller power from the adjusted initial power of the uplink reference signal and the uplink transmit power threshold as the transmit power of the uplink reference signal; and sending, by the terminal device, the uplink reference signal by using the transmit power of the uplink reference signal.