The entire life cycle of the bearing can generally be divided into three stages: the running-in period, the effective working period, and the recession period. The running-in period generally refers to the initial operation stage of the bearing. During this period, the various parts of the bearing experience a process of contact, friction, etc., until each part eliminates the deviation during processing and adapts to each other to achieve a stable working state. Therefore, the vibration of the bearing generally changes from strong to weak at this stage. Through the initial running-in, a good balance is achieved between the components of the bearing, the bearing enters a normal working state, and its vibration signal is relatively stable. Due to the harsh working environment, long-term operation, degradation of lubrication performance, etc., the parts where the bearing is more stressed will gradually suffer from fatigue damage, resulting in cracks, shedding, and other failures, and the performance begins to decline until the bearing fails completely. Vibration signal analysis is a more effective method in bearing fault diagnosis and prediction technology.