The stainless steel fiber sintered felt made with upper and lower protective nets and sintered together in vacuum and high temperature. Even if it is used under high pressure and high temperature, it is not easy to cause micropore deformation. It can play a stable filtration performance, and at the same time play the role of protection and diversion, and increase the filtration performance and longevity of the fiber sintered felt. Mainly used in polyester, polypropylene, polyethylene, nylon, polyethylene terephthalate, polyester film, lithium battery separator, packaging film and other industries.