Molecular grid air filtering net

The utility model relates to an air-purification and disinfection device, in particular relates to an air purification and disinfection filter screen. A molecule grid air-filtering screen includes a metal framework and filter layers, wherein, the filter layers include a non-woven fabric layer and a lightproof woven fabric layer and the metal framework includes a plurality pairs of set squares, with each pair of set squares correspondingly arranged; the tops of each pair of set squares are connected by a pressure plate; the bottoms of all set squares are connected together through a rectangle frame to be served as an air inlet and to form a set of camelback-shaped frame; a plurality of filter layers are arranged on the device and cover on two sides of each pair of set squares which are of the same side. The utility model has great air output and disinfection function.