电力工业作为国民经济的基础产业，一直是国家发展的重点对象。针对电厂大型发电机设备损坏后的修复，探讨了发电机转子密封段轴径磨损的补焊工艺，并采用电火花堆焊工艺现场修复，获得满意效果和成功经验。 As a basic industry of the national economy, the power industry has always been the focus of national development. Aiming at the repairing of the damaged large power generator equipment in power plant, the repairing process of the shaft diameter wear of the rotor of the generator rotor is discussed. The repairing on the spot by EDM is carried out to obtain satisfactory results and successful experience.