Abstract: Electrified railway box section posts and box switching stations have been widely used in railway construction and overhaul projects due to their significant advantages. However, due to their transportation gauge and structural characteristics, the internal equipment operating environment and user maintenance experience are difficult to meet expectations. Electrical integrated prefabricated power supply facilities, while retaining the advantages of box products, achieve the goals of meeting operation and maintenance requirements, improving the internal environment, and facilitating transportation through the application of non-metallic shell materials and on-site assembly installation and construction modes. Through technologies such as "factory prefabrication + modular assembly", the construction period can be greatly shortened and the difficulty of construction reduced, making it suitable for widespread application in the construction of power supply facilities for electrified railways on plateaus.