Abstract: In the large-scale network construction of urban rail transit, this paper closely followed the development strategy of transportation power, studied the application content of cloud platform in urban rail transit industry. Through the analysis of cloud computing technology characteristics, development status, and application of urban rail transit industry, the paper comprehensively constructed the overall framework, technical architecture, business application, deployment architecture, security architecture of cloud platform application, and analyzed the development trend of cloud platform application in urban rail transit industry, and provided application reference for promoting high-quality development of urban rail transit.