The mesh section is trapezoidal, the gap is narrow at the top and wide at the bottom. It is made of cold rolled stainless steel wire, and the screen bar and support bar are welded by automatic wedge mesh production equipment. The screen seam is uniform, the welding quality is stable, the opening rate is high, the service life is long, has the very high strength, the steel degree and the bearing capacity, can make the various shapes of the steel screening filter device.