At present, the information management of highway construction is still at different levels. Poor information coordination ability. Lack of adequate information technology support. BIM technology is used to realize cooperation and information integration among various disciplines. According to the characteristics of highway construction, this paper constructs the decomposition code of the BIM model by the particle swarm method. This model can better reflect the whole process of highway project cost control characteristics. The corresponding relationship between the “three-level list” and the BIM code is constructed. This paper makes a comprehensive analysis and discussion on the mapping between it and the “item list” in the three types of lists. Thus, BIM can be efficiently connected with the three-level list in the construction of bridge projects. It can better adapt to engineering construction and other engineering management requirements.