The P171581 hydraulic oil filter element is made of high-quality raw slurry filter paper through folding technology. The multi-layer filter paper has high filtration accuracy and good filtration effect, which can effectively intercept impurities such as metal particles, dust, and adhesive substances in the oil. The built-in galvanized steel punching skeleton can provide support performance for a single filter element, and the filter element will not deform after long-term use. P171581 hydraulic oil filter element can be used for the separation and recovery of products and intermediate products in refining and chemical production processes, liquid purification, purification of magnetic tapes, optical discs, and photographic films in manufacturing, and particle removal filtration of oilfield injection water and natural gas.