The needle felt is formed with the composition of metal fiber fabric and metal fiber cotton mesh by needle punching and thick non-oven filter media. It is quite similar to glass fiber filter, and has temperature ranging between 350 to 1000℃, depending upon the relativity to the rugged sintered material with porous content going up to 90% or more. The felt has better dust holding capacity and air permeability along-with long service life. The needle felt is also used in gas burners and high temperature muffler with striking properties of heat resistance, toughness, softness, high porosity and electrical conductivity.