Waste crushing device for construction site buildings

The invention discloses a waste crushing device for construction site buildings. The waste crushing device comprises a machine body shell, a crushing area and a waste collecting device; the crushing area and the waste collecting device are arranged in the machine body shell; the waste collecting device is arranged below the crushing area; multiple feed funnels are arranged at the top of the machine body shell; the feed funnels are arranged in an array form; the crushing area comprises a first crushing layer and a second crushing layer; the second crushing layer is arranged below the first crushing layer; multiple crushing wheels are arranged in the first crushing layer and the second crushing layer; crushing cutters are arranged on the outer walls of the crushing wheels; one ends of the crushing wheels are connected with wheel discs; the wheel discs are tangentially connected; the wheel discs are electrically connected with a Y355 motor; the Y355 motor is arranged in a mounting wall; the mounting wall is arra