How to promote the development of China's construction equipment leasing industry by electronic commerce is a very popular topic in the current research of industrial information. Based on the analysis of market functional requirements, the platform target design, architecture design and function design are carried out, by using modern network information technology, the OTO trading platform for building equipment leasing based on B/S architecture mode is constructed. The platform with the user management, business management, information exchange, technical services, credit guarantee and other five major functions, realized the'online to offline'OTO business operation mode and the application of transaction process, which aims to explore the new idea of leasing of construction equipment to meet the development needs of the era of information industry.