Building construction waste recycling and crushing device

The utility model discloses a building construction garbage recycling and smashing device which comprises a protective shell, a feeding pipe and an installation column, the feeding pipe is installed on the upper surface of the protective shell in a penetrating mode, a driving motor is fixedly installed on the rear surface of the protective shell, and a cavity is formed in the rear surface of the protective shell. And two transmission gears are mounted on the inner wall of a cavity in the rear surface of the protective shell, and a working cavity is formed in the protective shell. The building construction waste recycling device is provided with a first cam and material baffles, when the device works, a driving motor drives the first cam to rotate through a transmission chain, a protrusion of the first cam pushes a limiting plate to slide in a reciprocating mode, and then the limiting plate slides to drive the material baffle at one end to slide; raw materials in the feeding pipe are fed in batches through the