Environment-friendly dust falling equipment for construction site

The utility model discloses construction site green dust falling equipment which comprises a machine frame, the top end of the machine frame is rotationally connected with a rotating disc, a first sliding groove is formed in the middle of the top end of the rotating disc, two first sliding blocks are connected into the first sliding groove in a sliding mode, and the top ends of the two first sliding blocks are hinged to adjusting rods. The top ends of the two adjusting rods are hinged to the bottom end of a support, the support is rotationally connected with a gun barrel, a water collecting tank is fixedly arranged on one side of the top end of the rack, the water collecting tank fixedly communicates with a water storage tank through a hose, and the water storage tank is fixedly arranged in the rack. The first sliding block is driven by rotation to move, the adjusting rod is driven by the first sliding block to move, the support is driven by the adjusting rod to move up and down, and the gun barrel is driven