Dust falling device for engineering construction

The utility model relates to the technical field of engineering construction, and discloses a dust falling device for engineering construction, which comprises a base, the upper surface of the base is fixedly connected with an arc-shaped sliding rail, the inside of the arc-shaped sliding rail is slidably connected with a first sliding block, the upper surface of the first sliding block is fixedly connected with a water tank, and the lower surface of the base is fixedly connected with a vertical plate. The outer surface of the threaded rod is in threaded connection with a threaded sleeve, the outer surface of the threaded sleeve is fixedly connected with a fixing seat, a limiting rod is arranged in the fixing seat in a penetrating and inserting mode, one end of the atomization spraying barrel is fixedly connected with a connecting frame, and the connecting frame is hinged to the fixing seat. And when the fixing base moves up and down, the angle of the atomization spraying barrel can be changed, then the angle