Air filtering membrane and production process thereof

The invention discloses an air filtering membrane and a production process thereof. The air filtering membrane comprises an air filtering membrane body, wherein the air filtering membrane body is formed by laminating at least one layer of coarse filtering membrane and at least one layer of nuclear track micropore filtrating membrane; a plurality of nuclear track micropores penetrating through thenuclear track micropore filtrating membrane are formed in the nuclear track micropore filtrating membrane, and are used for preventing fine particulate matters from passing through but allowing air topass through. According to the design, filtration is firstly carried out through the coarse filtering membrane, PM2.5 particles cannot easily block the nuclear track micropores of the nuclear track micropore filtrating membrane, small-diameter particles incapable of being filtered through a general filtering membrane are effectively filtered, the permeability can be maintained, and the blockage time is prolonged. 本发明公开了种空