An audio signal processing method, comprising the following steps: acquiring (S210) a first distance s 1 between a current position O 1 and an initial position O of a mobile device , and a second distance d 1 between the current position O 1 of the mobile device and a wearable device ; the mobile device and the wearable device are in communication connection; determining (S220) a first deflection angle α of the mobile device according to the first distance s 1 , the second distance d 1 and the initial distance between the mobile device and the wearable device ; acquiring (S230) a second deflection angle β of the wearable device reflecting a posture change of the wearable device ; determining (S240) relative position information between the mobile device and the wearable device according to the first deflection angle α, the second deflection angle β and the second distance d 1 ; and processing (S250) an audio signal based on the relative position information to obtain a playback audio played by the wearable device ; the method being characterized by the step of determining (S240) relative position information between the mobile device and the wearable device according to the first deflection angle α, the second deflection angle β and the second distance d 1 comprises the following steps: obtaining (S241) a relative azimuth angle between the mobile device and the wearable device according to the first deflection angle α and the second deflection angle β; and determining (S242) the relative position information according to the relative azimuth angle and the second distance d 1 . acquiring (S210) a first distance s 1 between a current position O 1 and an initial position O of a mobile device , and a second distance d 1 between the current position O 1 of the mobile device and a wearable device ; the mobile device and the wearable device are in communication connection; determining (S220) a first deflection angle α of the mobile device according to the first distance s 1 , the second distance d 1 and the initial distance between the mobile device and the wearable device ; acquiring (S230) a second deflection angle β of the wearable device reflecting a posture change of the wearable device ; determining (S240) relative position information between the mobile device and the wearable device according to the first deflection angle α, the second deflection angle β and the second distance d 1 ; and processing (S250) an audio signal based on the relative position information to obtain a playback audio played by the wearable device ; the method being characterized by the step of determining (S240) relative position information between the mobile device and the wearable device according to the first deflection angle α, the second deflection angle β and the second distance d 1 comprises the following steps: obtaining (S241) a relative azimuth angle between the mobile device and the wearable device according to the first deflection angle α and the second deflection angle β; and determining (S242) the relative position information according to the relative azimuth angle and the second distance d 1 . obtaining (S241) a relative azimuth angle between the mobile device and the wearable device according to the first deflection angle α and the second deflection angle β; and determining (S242) the relative position information according to the relative azimuth angle and the second distance d 1 . <EOS>