Building waste material crusher

The utility model relates to the technical field of crushers, in particular to a building waste material crusher which comprises a shell, two crushing shafts are installed on the inner wall of the shell, four supporting legs are installed on the surface of the shell, a vibration device is arranged on the inner wall of the shell, the vibration device comprises two supports, and the two supports are arranged on the outer wall of the shell. The two supports are fixedly connected with the inner wall of the shell, the sides, close to each other, of the two supports are rotationally connected with rotating blocks, one ends of the rotating blocks are fixedly connected with first gears, the tooth surfaces of the first gears are in meshed connection with second gears, and the sides, away from the supports, of the second gears are fixedly connected with motors. The motor is fixedly connected with the inner wall of the shell, the inner wall of the shell is rotationally connected with a sliding plate, the surface of the