Abstract: Aimed at the problems of existing EMU overhaul operation guidance, this paper proposed the solution of EMU overhaul operation guidance based on augmented reality technology. The requirements of applying augmented reality in EMU overhaul operation guidance was analyzed, on this basis, EMU overhaul operation guidance system based on augmented reality was designed. The augmented reality technology was used to display the words and pictures and solve the problem that the complex maintenance process displayed by words and pictures was not intuitive enough. The solution could make EMU overhaul operation guidance more convenient, visual and intelligent, and lay the foundation for future research and development of the system