A method for sending a sounding reference signal SRS, comprising: receiving , by a terminal device , a first configuration information of an SRS resource of a first slot from a network device , wherein the SRS resource is an aperiodic SRS resource, the first configuration information comprises a repetition factor L r of the SRS resource, and the first configuration information indicates that the SRS resource consists of four OFDM symbols: determining , by the terminal device based on the first configuration information of the SRS resource and the first slot, a count n SRS of positions for SRS sending, and determining , by the terminal device based on the n SRS , frequency domain resources to which the SRS resource is mapped in the first slot; and the n SRS is associated with the frequency domain resource of the four OFDM symbols; wherein the n SRS represents a count of positions at which the SRS resource is transmitted on a same subcarrier and continuous symbols that satisfies: n SRS = ⌊ l ′ / L r ⌋ wherein l' represents a difference between a symbol number of the four OFDM symbols in the first slot and a starting symbol number of the SRS resource in the first slot, l' =0, 1, 2, or 3, L r = 2, and the starting symbol of the SRS resource in the first slot is in the last 6 OFDM symbols of the first slot; sending , by the terminal device , the SRS to the network device on the determined frequency domain resources. receiving , by a terminal device , a first configuration information of an SRS resource of a first slot from a network device , wherein the SRS resource is an aperiodic SRS resource, the first configuration information comprises a repetition factor L r of the SRS resource, and the first configuration information indicates that the SRS resource consists of four OFDM symbols: determining , by the terminal device based on the first configuration information of the SRS resource and the first slot, a count n SRS of positions for SRS sending, and determining , by the terminal device based on the n SRS , frequency domain resources to which the SRS resource is mapped in the first slot; and the n SRS is associated with the frequency domain resource of the four OFDM symbols; wherein the n SRS represents a count of positions at which the SRS resource is transmitted on a same subcarrier and continuous symbols that satisfies: n SRS = ⌊ l ′ / L r ⌋ wherein l' represents a difference between a symbol number of the four OFDM symbols in the first slot and a starting symbol number of the SRS resource in the first slot, l' =0, 1, 2, or 3, L r = 2, and the starting symbol of the SRS resource in the first slot is in the last 6 OFDM symbols of the first slot; sending , by the terminal device , the SRS to the network device on the determined frequency domain resources. determining , by the terminal device based on the first configuration information of the SRS resource and the first slot, a count n SRS of positions for SRS sending, and determining , by the terminal device based on the n SRS , frequency domain resources to which the SRS resource is mapped in the first slot; and the n SRS is associated with the frequency domain resource of the four OFDM symbols; wherein the n SRS represents a count of positions at which the SRS resource is transmitted on a same subcarrier and continuous symbols that satisfies: n SRS = ⌊ l ′ / L r ⌋ wherein l' represents a difference between a symbol number of the four OFDM symbols in the first slot and a starting symbol number of the SRS resource in the first slot, l' =0, 1, 2, or 3, L r = 2, and the starting symbol of the SRS resource in the first slot is in the last 6 OFDM symbols of the first slot; sending , by the terminal device , the SRS to the network device on the determined frequency domain resources. <EOS>