Sintered multi-layer valve filter element is welded by vacuum electron beam, used for filtration of hydraulic oil and gas in hydraulic and air control system. It features high precision, good rigid, lower resistance, larger flow capacity. And also it has advantages of cleanness, easy use, stable filtering aperture and longer service; it is alternative for sintered bronze powder filter element, (the first generation valve filter) and metal mesh filter supported by framework(the second generation valve filter) and even imported wire wound filter element to make the serve system more stable and reliable.