Feeding device for metal scrap treatment and using method

The invention discloses a feeding device for metal scrap treatment and a using method, and relates to the technical field of metal scrap machining. And the crushing device is used for crushing the metal wastes. Through the arrangement of the crushing device, the feeding part, the cake pressing device, the discharging pipe, the material receiving barrel, the first hydraulic rod, the vertical rod, the cake pressing barrel and the blocking rod, received metal waste can be conveyed into the cake pressing barrel through the material receiving barrel, so that the metal waste is in the state that the periphery is convex and the middle is concave in a cake pressing cavity; after the metal scraps in the state are extruded into metal cakes, the peripheries of the metal cakes are uniformly extruded, so that the peripheries of the metal cakes are in a compacted state, and the conditions that the peripheries of the metal cakes are not uniformly stressed during extrusion, so that local parts are not compacted, and the meta