Abstract: Rolling bearing is regarded as the key component of high-speed trains. The characteristics of high-speed, long-term and continuous operation of China’s Electric Multiple Units (EMUs), as well as the variable operating environment, make the working environment and internal stress state of EMUs’ bearing more complex than those of general bearing, which puts forward higher requirements for the design, manufacture and reliability of bearing. To realize the localization of China's high-speed railway core technology, a number of researches were carried out on the EMUs’ bearing in recent years. This paper firstly introduces the design and manufacturing technology of the EMUs’ bearing, and discusses the typical in-service failure modes of the EMUs’ bearing, as well as the failure mechanisms and effects. Consequently, the fault diagnosis methods of the EMUs’ bearing are classified and summarized, and the reliability modeling and life evaluation methods of the EMUs’ bearing are reviewed. Finally, the reliability test of the EMUs’ bearing is briefly described. This paper summarizes the research of bearing and its reliability for EMU trains, which can provide a reference for the design and manufacturing technology of the bearing of China’s high-speed EMUs.