The pleated melt filter element for high temperature gas filtration is mainly made from pleated stainless steel fiber sintered felt with a multi-layer structure arranged from coarse to fine pores, offering high porosity, excellent dirt holding capacity, high filtration precision, high temperature and corrosion resistance, high mechanical strength, good processability, and long service life. This filter element features a large filtration area, low pressure drop, and good air permeability, making it particularly suitable for filtering polymer melts, high-temperature gases, steam, high-temperature liquids, and viscous liquids. Its all-stainless steel construction ensures broad chemical compatibility and allows filtration in -200 to 600 °C and acidic/alkaline environments. It can be regenerated multiple times via chemical cleaning, high-temperature treatment, and ultrasonic cleaning, significantly reducing operating costs. Widely used in petrochemical, polymer, oil-water separation, high-temperature gas, and pharmaceutical media separation and purification.