The rebar shredding machine is mainly made of the material through the feeding system into the shredding box, carrying a shredding blade on the box, and the material of the shredding machine of the paint bucket is torn, extruded and cut through shredding, squeezing and shearing, and it is ripped into small pieces of material and discharged from the lower part of the box. The iron and aluminum particles treated by the cans can be directly sold to the steel mill for smelting again. According to our market survey, the purchase price of the paintwork of the waste can is seven hundred to eight hundred yuan a ton, and the recovery price of the iron particles made after the crushing is one thousand yuan a ton, in which the profit space is considerable.