Wood product immersing treatment oil is prepared by following components including 5-10 parts of walnut oil, 10-20 parts of natural beeswax, 15-20 parts of soybean, 8-15 parts of wool grease, 0.6-0.9 part of mildew preventive, 0.6-0.9 part of bactericide, 2-6 parts of camphorated oil, 2-5 parts of phosphatidylcholine, 0.6-1.5 parts of emulgator, 25-45 parts of water and 3-5 parts of scented water. The prepared treatment oil plaster is applied to wood, a layer of oil grease protection film can be formed, and a coated object is wetted through the oil grease and is more lubricated and attractive. Meanwhile, the situation that the coated object is influenced by the high-humidity or extreme dry climate can be avoided, the friction strength in the playing process can be increased through beeswax particles in the treatment oil plaster, and a better manual polishing effect is achieved. The wool grease is adopted as a main nourishing component, inner fiber of leather is deeply moistened, and the lecithin is added to promote seepage. Meanwhile, the camphorated oil, the mildew preventive and the bactericide are added, and leather molding and insect breeding are effectively prevented. The product is convenient to use and is suitable for various types of leather products.