A hydropower station maintenance simulation system based on virtual reality technology is studied. The three-dimensional model of the hydropower station is integrated with the five-sided LED-CAVE display system through the virtual reality platform, and the interactive logic function program is written through the virtual reality platform to give the static hydropower station three-dimensional model interactive capabilities.By constructing a three-dimensional model of the factory premises and surrounding environment, and an accurate three-dimensional model of the plant's internal equipment units, the virtual reality platform is used to integrate the model data of the data layer, the training evaluation business data and the simulation system of the platform layer to realize the scene roaming function and equipment cognitive function, perspective display function, section display function, equipment disassembly function, equipment installation function, information presentation function, and virtual-real interaction function.