By analyzing the requirements of BIM informatization specifications in the transportation industry, the data governance framework for processing highway information models and business data is designed. Among them, the unified standard data system and data association and fusion processing mechanism adapted to the highway big data management are studied, and the highway big data governance platform is established to realize various functions such as unified coding, multi-source data storage and basic data services. Finally, it is applied to highway construction, operation and maintenance management, and further realizes the digital management of the whole cycle and multiple elements of the expressway.