The utility model relates to the technical field of drying box equipment. The utility model relates to a dryer, in particular to a negative-pressure carbon fiber far-infrared electric heating plate dryer. The box comprises a box body and a box door, an air inlet chamber, a moisture removal chamber and a drying chamber are sequentially arranged in the box body from top to bottom. An air inlet interlayer cavity and an air outlet interlayer cavity are formed in the inner wall of the box body, the air inlet interlayer cavity is located in the two side walls of the box body and communicated with the air inlet chamber, multiple rows of air inlet holes communicated with the drying chamber are formed in the inner wall of the air inlet interlayer cavity, and air outside the box body sequentially passes through the air inlet, the air inlet chamber, the air inlet interlayer cavity and the air inlet holes to enter the drying chamber to form air inlet channels. The air outlet interlayer cavity is located in the rear side wall of the box body and communicates with the moisture removal chamber. a moisture removal guide air duct communicated with the drying chamber is arranged in the moisture removal chamber; according to the drying machine, the relative balance of the air inlet amount and the moisture exhaust amount can be controlled, it is guaranteed that the air inlet amount and the moisture exhaust amount in the drying chamber are kept relatively uniform, the drying efficiency is high, and the drying machine is environmentally friendly.