The copper filter can effectively solve the problems of large flow resistance, easy deformation, low strength, short service life and unguaranteed product quality of the existing filter. The mesh is composed of five layers of metal meshes that are stacked and sintered at an angle of 45°. The filter control layer is under the protective layer. There is a shunt layer between the filter control layer and the support layer. The support layer (or skeleton layer) There is a reinforcing layer below, and the periphery of each layer is made of wrapping. In the production of petrochemical and chemical fibers, sintered mesh filters are commonly used key components for filtering high-viscosity polymer extrusion materials such as polypropylene and polyethylene.