Automatic residue crushing device for dish-washing machine

The invention provides an automatic residue crushing device for a dish-washing machine. The automatic residue crushing device comprises a water containing groove, a water cup and a residue crushing component, wherein the water containing groove is formed in a bottom plate of the dish-washing machine, and a water through hole is formed in the bottom of the water containing groove; the water cup isarranged at the bottom of the water containing groove, and an opening is formed in the top of the water cup; the opening is in liquid seal connection with the water through hole; the residue crushingcomponent is arranged on the lower part of the water cup to be used for crushing residues flowing into the bottom of the water cup along with water; a drain outlet is formed in the lower part of the water cup to be used for draining the crushed residues and sewage. With the adoption of the structure, the residues produced by cleaning tableware or foods flow into the water containing groove along with water and drop into the bottom of the water cup by virtue of the water through hole and the opening, the dropping residues are crushed by the residue crushing component, and the crushed residues are drained from the drain outlet along with the sewage, so that the pipeline is effectively prevented from being blocked. Meanwhile, the structure is directly arranged at the bottom of the dish-washing machine, the pipeline space is not occupied, and the automatic residue crushing device is low in manufacturing cost and long in service life.