According to properties of fibrous materials, RF use different ratios of fibrous materials to produce various air filter materials which made by multilayer or monolayer forming and one side or two-sided gluing, satisfy different requirements of clogging capacity and filter efficiency. Air permeability and filter fineness are considered for choosing air filter papers. Our air filter papers can meet needs of producing various of air filters in the market, and can be used for applications of trucks, cars and passenger cars of heavy and light type.