The stainless steel multi-layer sintered mesh filter cartridge is mainly made by pleating stainless steel fiber sintered felt, forming a multi-layer structure from coarse to fine. It offers high porosity, large contaminant-holding capacity, high filtration precision, high temperature and corrosion resistance, high mechanical strength, easy processing, and long service life. The medium can be cleaned and regenerated for reuse, making it suitable for long-term repeated filtration, especially in gas and high-viscosity liquid applications in petrochemical, power, aerospace, and chemical fields.