Air suction device for coating production workshop

The utility model discloses an air suction device for a coating production workshop, which comprises a ventilation pipeline and a fan, and the air suction device comprises the ventilation pipeline, a pipeline connecting piece I, a ventilation cylinder I which is vertically and downwards mounted, a pipeline connecting piece II, a filter cartridge which is horizontally mounted, a pipeline connecting piece III, a ventilation cylinder II and a pipeline connecting piece IV, the fourth pipeline connecting piece is connected with the ventilation pipeline, a novel motor is installed on the outer side of the third pipeline connecting piece, a rotating shaft capable of rotating freely is arranged in the ventilation pipeline, and the two ends of the rotating shaft are connected with the outer side wall of the third pipeline connecting piece and the outer side wall of the second pipeline connecting piece respectively. The output end of the novel motor is connected with the rotating shaft, a plurality of filtering pieces