Environment-friendly ventilation fan for breeding shed

The utility model discloses an environment-friendly ventilation fan for a breeding shed. The device mainly comprises a main shell, fan blades, a connecting shaft set, a belt, a motor, filtering cotton, a liquid injection manifold, a filtering grid, a sundry collecting box, a main shell, louver blades, a fan blade support, a connecting shaft hole, a filtering cotton support, a liquid injection column hole, a connecting shaft, a shaft head cover, a belt pulley, a grid frame, triangular grid bars, butt joint secondary openings, a collecting box body, butt joint primary openings, valve plates, cleaning openings and grid covers. Wherein the main shell is made of a stainless steel plate or a galvanized plate, the middle part of the main shell is of a cylindrical structure, and two ends of the main shell are lofted and deformed into a square structure. The air filtering and treating device is good in air filtering and treating effect, high in efficiency, free of increasing power consumption,low in production and man