Abstract: In this paper, the failure mode and effect analysis (FMEA) method and process are introduced. Combined with the maintenance management characteristics of nuclear power plants, a simplified FMEA method is formed. The failure mode, fault impact and maintenance strategy of the critical component management (CCM) equipment in CPR1000 units are analyzed. The CCM equipment FMEA database is established. Practice has proved that the development of this work not only identifies the potential shutdown and shutdown failure modes that CCM equipment management has not covered, but also finds errors and inconsistencies in the CCM equipment technical documents, and also reviews the correctness and completeness of the CCM equipment list. At the same time, based on group operation and maintenance big data, the maintenance strategies of multiple CCM equipments are systematically optimized to make up for the lack of maintenance management of CCM equipment, reduce unnecessary investment in CCM equipment maintenance resources and manage equipment related to CCM equipment. It is of important reference value for the implementation of the management of CCM equipment and the mitigation of the risk of unplanned shutdown of nuclear power plants.