Abstract: Learned from the practical experience of digital twin technology in product remote operation and maintenance, and based on the actual situation of EMU operation and maintenance information construction, this paper analyzed the application requirements of digital twin technology in EMU operation and maintenance process, studied the overall architecture of EMU operation and maintenance management system based on digital twin technology, and designed three applications of digital twin EMU, digital twin operation station and digital twin advanced repair workshop, so as to realize the integrated display of all elements of EMU operation and maintenance, ensure EMU operation safety, and support accurate operation and maintenance management. The application of digital twin technology in EMU operation and maintenance helps to solve the problems of data dispersion, insufficient data mining and lack of fusion display in EMU operation and maintenance informatization.