NOVELTY - A double-layered drawer type vertical compost reactor comprises an inner part that is made up of an upper and a lower movable drawer type fermentation bin, which goes out and in by drawing; where when the fermentation bins close, the whole reactor is sealed; the outside of the reactor is attached with a heat insulating layer; the top of the reactor is provided with an air inlet and an air buffer chamber; the both sides of the upper and lower movable drawer type fermentation bins are connected with a blower; and the reactor is provided with parts for the layered grid drawer.    USE - The double-layered drawer type vertical compost reactor is useful for industrial applications.    ADVANTAGE - The double-layered drawer type vertical compost reactor is provided with parts for the layered grid drawer to contribute to the attainment of accurate positioning and sampling in the test process of composting.    DETAILED DESCRIPTION - A double-layered drawer type vertical compost reactor comprises an inner part that is made up of an upper and a lower movable drawer type fermentation bin, which goes out and in by drawing; where when the fermentation bins close, the whole reactor is sealed; the outside of the reactor is attached with a heat insulating layer; the top of the reactor is provided with an air inlet and an air buffer chamber that can match with the air exhauster at the lower part to attain vertically exhaust the air; the both sides of the upper and lower movable drawer type fermentation bins are connected with a blower through an air duct and a spray painting plug for ventilation of the side wall during the fermentation; it is possible to blast air crossways both in the horizontal and vertical directions through intelligent control to increase the efficiency of composting; the two movable drawer type fermentation bins of the reactor can carry out primary and secondary fermentations respectively at the same time and attain to control secondary pollution by special structure; and the reactor is provided with parts for the layered grid drawer to contribute to the attainment of accurate positioning and sampling in the test process of composting.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the double-layered drawer type vertical compost reactor.