MP20 metal based resin composite bearings are made of high-quality low-carbon steel as the substrate, with a spherical porous copper powder layer sintered in the middle. The surface is coated with wear-resistant lubricating materials mainly modified polyoxymethylene (POM) or polyetheretherketone (PEEK) as the working layer of the bearing. The regular oil holes on the surface can not only store grease, but also effectively bury external invading dust, improving the service life of the bearing. This material has excellent mechanical load-bearing capacity, and the middle copper powder layer can not only timely transfer the heat generated during the operation of the bearing, but also improve the bonding strength between the plastic layer and the substrate. The surface wear-resistant material design mainly made of POM or PEEK is suitable for grease lubrication conditions. The bearing surface is regularly arranged with oil holes for storing grease to ensure the reasonable distribution of lubricant on the entire bearing surface.