Concrete processing pulverizer for building

The utility model relates to the technical field of concrete processing, and discloses a building concrete processing pulverizer which comprises a pulverizer box body, a horizontal driving shaft rod is rotationally connected to the upper side of an inner cavity of the pulverizer box body, a pulverizing assembly is arranged on the driving shaft rod, and the pulverizing assembly comprises a pulverizing disc and a tool bit. A screening mechanism is arranged on the bottom side of an inner cavity of the pulverizer box body and comprises a screening baffle, the screening baffle is in an arc shape and is matched with the pulverizing disc, the outer side wall face of the screening baffle makes contact with the side wall face of the inner cavity of the pulverizer box body in an attached mode, and vibration sliding grooves are symmetrically formed in the front side wall face and the rear side wall face of the inner cavity of the pulverizer box body. And shaking mechanisms for driving the screening baffles to vibrate ar