The use of bearings in engines is crucial. They not only bear the functions of support and positioning, but also play a role in reducing friction and improving efficiency during the operation of the engine. With the development of modern automobile technology, the working environment of the engine is becoming more and more complex, and the speed and load are also increasing, which puts higher requirements on the performance of bearings. Therefore, developing high-performance bearing materials and optimizing bearing design have become important tasks for engineers. At present, many high-end engines have begun to use new materials such as ceramic bearings and composite bearings. These materials not only have better wear resistance and high temperature resistance, but also can effectively reduce the overall weight of the engine, thereby improving the fuel economy of the vehicle. In addition, with the advancement of intelligent manufacturing technology, the production process of bearings is also constantly improving. The application of precision machining technology and surface treatment technology has significantly extended the service life of bearings. In the future, with the popularization of electric vehicles and hybrid vehicles, the design and application of bearings will also face new challenges. How to reduce production costs and environmental impact while ensuring performance will be an important issue that the industry needs to face together.