By analyzing the application points and the current situation of digital delivery in each stage of highway engineering construction, the paper summarizes the lack of management and definition of parameters in the modification and refinement process of BIM model source files at each stage, which leads to difficulties in the splitting and refinement of BIM models at each stage and even the need for reconstruction and other problems. It is proposed to strengthen the overall planning of the whole life cycle, clarify the demand of model parameters by sorting out the application points of each stage, and reserve and classify the model parameters of each stage. The concept of "overall description", "local description", "section description", "model element" and other parameters are proposed based on the basic idea of model creation, and the use scenario and classification principle of each parameter are specified in detail, so as to improve the problems of parameter redundancy and repeated definition caused by parameter reservation, and achieve a clear definition and orderly management of model creation parameters. It improves the efficiency of model creation, modification and parameter use, and provides a solution for the parameterization of BIM model application in the whole life cycle.