The invention discloses a garbage recycling device and a recycling method thereof. The garbage recycling device is used for processing kitchen waste and dry garbage, wherein the recycling device comprises a screw conveyor, a cleaning device, a crusher and a dryer; the screw conveyor comprises a material groove with high and low differences at two ends, the low end of the material groove is provided with a feed port, the bottom part of the barrel wall of the high end of the material groove is provided with a discharge port, and the bottom of the material groove is provided with a liquid discharge hole at the low end; the cleaning device is located above a screw conveying shaft in the material groove; the feed end of the crusher is hermetically connected to a discharge port of the screw conveyor, the dryer is connected with the discharging end of the crusher. According to the scheme, the garbage recycling device allows the liquid in the wet garbage to concentrate at a drainage hole underthe action of gravity to achieve emissions, so that the area of the drainage hole can be greatly reduced, in addition, a large size liquid collection groove is not required, and the difficulty of waste liquid collection is reduced; meanwhile, compared with existing oil and salt removing equipment, the design of the structure of the screw conveyor and the cleaning device is more reasonable, easier to realize, save a delivery crushing mechanism at the front end and more simple in structure.