Abstract: In order to realize the deep fusion and visualization of the operation mechanism and maintenance knowledge of the hydraulic turbine regulating system, and to improve the efficiency of hydropower plant operation and maintenance training, a virtual simulation training platform for integrated operation and maintenance of hydraulic turbine regulating system is developed.3ds Max is used to model hydraulic turbine regulating system's components and the their distribution scenes in a plant in 3D;based on the Unity 3D engine, the maintenance process of the hydraulic turbine regulating system is demonstrated by multimedia animation and interactive operation, and the whole system dynamic simulation modeling is carried out according to its working principle and operating procedures.The platform can realize virtual roaming, three-dimensional interactive maintenance and virtual operation of the whole system.By providing an interactive learning environment with deep immersion, it changes the traditional inefficient maintenance training mode, and provides a reference for the standardization and specialization of hydropower station training.