A disposable double-channel cigarette includes a tobacco unit, a heat source unit and a filter unit; wherein the tobacco unit includes a tobacco unit channel, a suction end and an ignition end; the heat source unit includes a heat source unit channel; and the filter unit includes a filter unit channel, and the filter unit is arranged at the suction end of the tobacco unit. A pneumatic device and a tobacco component are arranged in the tobacco unit channel; an air extraction device and a fuel component are arranged in the heat source unit channel; a linkage device is arranged between the pneumatic device and the air extraction device, and the linkage device transfers power between the pneumatic device and the air extraction device. A method for preparing the disposable double-channel cigarette described above is further provided.