Environment-friendly dust cleaning device for green construction of constructional engineering

The utility model relates to a building engineering green construction environment-friendly dust cleaning device which comprises a dust suction cylinder, a fan and a dust box, a moving disc used for moving is arranged below the dust suction cylinder, the input end of the dust box communicates with the lower portion of the moving disc through an air pipe, and a filter screen is arranged in the dust box. A filter screen is arranged in the dust box, one side of the filter screen is rotationally connected with a cam used for patting the surface of the filter screen, the other side of the filter screen is provided with a scraping plate in an attached mode, a rotating plate is rotationally connected between the dust box and the dust collection barrel, and the rotating plate and the scraping plate are arranged in a linkage mode. The cam used for tapping the surface of the filter screen is arranged on one side of the filter screen, so that dust adhering to the filter screen is flapped off, meanwhile, the scraping pla