The chain conveyor transports the waste small household appliances to the shredder for tearing, shearing and crushing, which crushes the small household appliances into smaller particle sizes, and shocks the ferrous, non-ferrous and non-metallic metals into scattering through the vibrating feeder - to improve the efficiency of the subsequent process. The material is separated from ferrous metal by magnetic separator, the rest of the material is separated from non-ferrous metal and non-metal by eddy current sorter, and the non-ferrous metal is then separated from copper and aluminum by air current sorter and sent out by the respective conveyor.