Efficient dust falling device for road and bridge construction

The invention discloses an efficient dust falling device for road and bridge construction, and relates to the technical field of construction dust falling equipment, a first rotating shaft is arranged in a cavity plate, the first rotating shaft penetrates through the cavity plate, one end of the first rotating shaft is connected with the inner bottom surface of the cavity plate, and a first gear is arranged on the first rotating shaft; and a first base is arranged at the position, located on the upper surface of the cavity plate, of the other end of the first rotating shaft, a pair of first supporting plates are arranged on the first base, a spraying and dust falling mechanism is arranged above the cavity plate, and the spraying and dust falling mechanism is rotationally connected with a first connecting shaft between the first supporting plates through a first mounting plate at the tail. The first rotating shaft and the second rotating shaft are arranged in the cavity plate, the first rotating shaft is conne