Building waste crushing device

The utility model discloses a building waste crushing device which comprises a box body, blocking mechanisms are fixedly connected to the two sides of the top of the box body, a first motor is fixedly connected to the right side of the box body, a first rotating rod is fixedly connected to an output shaft of the first motor, and a first gear is fixedly connected to the left side of the first rotating rod; the rear side of the first gear is engaged with a second gear, the left side of an inner cavity of the second gear is fixedly connected with a second rotating rod, and the bottom of the inner cavity of the box body is fixedly connected with a filter plate. According to the utility model, the box body, the blocking mechanism, the first motor, the first rotating rod, the first gear, the second gear, the second rotating rod, the filter plate, the fixed box, the second motor, the conveying wheel, the dust collection box, the third motor, the dust collection fan and the storage bin structure are matched for use;