With the development and reform of electric power enterprises, the demand for electric power inspection personnel in power plant enterprises has increased. However, power generation companies have problems such as different training needs for maintenance personnel, training methods that do not conform to enterprise development, and mismatch between teaching materials and training work. At the same time, the differences in employees’ own professional skills and ability to receive knowledge have resulted in low training efficiency. In order to solve this situation, this paper analyzes the shortcomings of the existing training methods, systems and standards for power plant maintenance personnel. The mixed reality augmented technology was proposed to improve the training efficiency of power plant maintenance personnel.