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Oil permeability is a major quality defect restricting the application of food packaging paper and catering paper. Edible oil, seasoning oil and grease substances can quickly penetrate ordinary paper along fiber gaps, causing paper softening, layer separation, oil leakage and structural damage. Grease penetration will contaminate outer packaging, damage packaged food hygiene, and greatly shorten the service life of disposable catering paper and food wrapping paper. Most traditional oil-proof treatments adopt thick coating modification, which blocks paper air permeability, makes paper hard and brittle, affects food fresh-keeping effect, and increases production cost significantly. Some low-grade oil-proof agents contain fluorine-containing components, which fail to meet food contact safety standards and face environmental use restrictions. For food-grade paper enterprises, it is difficult to balance oil resistance, air permeability, food safety and production cost in daily production. Shandong Ludao Energy Technology Co., Ltd. provides eco-friendly food-grade anti-oil optimization solutions. By building compact lipophobic molecular protective layers on fiber surfaces, we block grease molecule penetration from the root, realize hierarchical oil resistance grade adjustment. The modified paper retains proper air permeability, maintains soft hand feel and folding performance, uses non-fluoride safe raw materials compliant with food testing standards, avoids oil leakage and grease erosion, reduces packaging oil pollution risk, and helps enterprises produce high-standard safe oil-proof catering and food packaging paper.