Building waste crushing device for building construction

The utility model discloses a construction waste crushing device for building construction, which comprises a jaw crusher, a screening mechanism is arranged at the bottom end of the jaw crusher, the screening mechanism comprises a screening assembly and a vibration assembly, the screening assembly comprises a screen, a fixed frame is arranged outside the screen, and the vibration assembly is arranged in the fixed frame. A placing frame is arranged outside the fixing frame; by means of the design of the jaw crusher, the containing frame, the clamping block, the movable column conveying assembly and the screening mechanism, crushed objects flowing out of the jaw crusher can fall to the top end of the screen, the crushed objects conforming to the needed size directly pass through the screen and fall to the second conveying rail to be conveyed, the crushed objects not conforming to the needed size directly pass through the screen to be conveyed, and the crushing efficiency is greatly improved. And when the materi