The present disclosure provides a sound recording method and device, which belongs to field of multimedia processing. The method is applied in a mobile terminal equipped with three microphones, including: acquiring (202, 310) three channels of sound signals collected by the three microphones; calculating (204) a central channel signal, a left channel signal, a right channel signal, a rear left channel signal and a rear right channel signal in a 5.1 sound channel according to the three channels of sound signals; calculating (206) a bass channel signal in the 5.1 sound channel according to the three channels of sound signals; and combining (208, 350) the above signals to obtain a sound signal of the 5.1 sound channel.