Fresh air processing system provided with sterilizing and dedusting device

The utility model relates to a fresh air processing system provided with a sterilizing and dedusting device. The system comprises an air supplying pipeline and a fresh air supplier and is characterized in that photocatalyst coatings are arranged on the surfaces of the side walls and the surface of the lower wall of the air supplying pipeline behind the fresh air supplier respectively, and an ultraviolet lamp is longitudinally installed on the upper portion of the air supplying pipeline and can irradiate the photocatalyst coatings. Compared with the prior art, the system has the advantages that fresh air is sterilized by means of ultraviolet light which catalyzes photocatalyst to degrade and has a disinfecting function, and PM2.5 and microorganisms adhering to PM2.5 in the air are removed through a medium efficiency filter, so that the quality of introduced fresh air is guaranteed; the structure is simple, cost is low, and installation and management are convenient.