The invention discloses a dispersed fiber parching method and a device thereof, and belongs to the field of dispersed fiber parching technology. The device comprises a driving motor which is in linkage connection with an air blower, wherein the air blower is connected with a heat exchanger that is connected with a parching machine; a condensing device is connected with the parching machine and the air blower. According to the method and device disclosed via the invention, a special bobbin suitable for the parching device is improved, so that the high-temperature high-pressure full-closed type parching mode for dispersed fiber is achieved, and the equipment and labor can be effectively saved, and the energy consumption and the cost of production are reduced, and the quality of products is improved as well.