The sintered powder metal filter is made of metal powder pressed through a mold and then sintered at a high temperature. It has the advantages of high mechanical strength, high-temperature resistance, good corrosion resistance, uniform pore size distribution, good air permeability, cleanable regeneration, welding, machining, etc. The sintered powder metal filters are widely used in gas-liquid filtration and separation in the fields of the chemical industry, medicine, beverage, food, metallurgy, petroleum, environmental protection and fermentation, dust removal, sterilization, and oil mist removal of various gases and steam; gas buffer, etc.