The SF-2 boundary self-lubricating bearing uses a steel plate as the base, sintered spherical tin bronze powder as the intermediate layer, and the surface is rolled to modify polyoxymethylene (POM) and has an oil storage pit. The thickness of the surface plastic is 0.5mm, which has good wear resistance, and can work normally under the condition of little oil or short time oil-free. It is suitable for working under normal temperature conditions and places with low speed and heavy load, to replace the traditional copper sleeve, which reduces the cost and prolongs the service life. It have been widely used in automobile chassis, forging machine tools, metallurgical and mining machinery, engineering machinery, hydropower, steel rolling industry and other fields.