The phenomenon of wear is one of the problems that the industry has been facing for a long time and causes major destructions in the industry. There are several ways to reduce it to a great extent. surface coatings can reduce the amount of surface wear. Therefore, the contact of coated surfaces under lubricated contact and its tribological behavior is of great importance in industry. A variety of coating are used in different machines to improve the performance of the element. The use of coatings on the surface eliminates the need for expensive alloys against wear and corrosion and is highly recommended economically. Many of these coated surfaces are designed to operate under full-film regime. However, during start and stop as well as under heavy loads and/or low speeds, the lubricant film which is formed is not able to fully protect the asperities and the lubrication regime transfers from full-film to mixed lubrication. Coating is used to control friction and wear when surfaces come in contact with each other. Many mechanical parts can be prevented from demolition by lubrication. In this regime, most of the load applied is borne by the thin layer of lubricant, also called fluid film. Part of the load is borne by the roughness of the surface, which on the one hand increases the surface temperature and causes wear and on the other hand changes the topography of the surface due to the deformation of the elastic, plastic or elasto-plastic roughness. Most of the researches in this field have been done by trial and error method on chosen material and tribological behavior of coated. In this research, an attempt has been to use theoretical concepts and by describing the tribological behavior, a suitable method can be selected to model a pin that is located on a rotating coated disk. In this research a numerical model based on the load-sharing concept is developed to predict the friction coefficient of the contacting surfaces. In this model, the total load is assumed to be carried by the lubricant film as well as the asperities. The novelty of the presented model compared to similar researches conducted based on the load-sharing concept is that one of the surfaces are coated and coating thickness plays a major role in the tribological behavior of the tribo-system. The lubricant film thickness, the load carried by asperities as well as the lubricant film, the surface temperature, and the friction coefficient are predicted by the model and the results are verified by comparing with the experimental results of Komvopoulos et al. Keywords: Load-sharing, Mixed elastohydrodynamic lubrication, Traction coefficient, Coating, Contact temperature ;