Fluorine needled felt is a kind of rational structure, a good performance of the new type of high efficient filtration material, has advantages of the glass fiber woven filter material with high temperature resistant, acid and alkali corrosion resistance, dimension stability and high strength. It is made of 100% non-alkali glass fiber with high support glass fiber filament and the silk is made of wool with good heat resistance fire retardant and anticorrosive effect. With small resistance, filtration velocity is higher than the double woven filter material, which is the purification industries such as steel, smelting blast furnace gas, flue gas filter of the preferred products.