This paper is based on the research on classification and coding of prefabricated building information at home and abroad, and combines with the current application status of existing building information model classification and coding standards at home and abroad, a classification and coding system for prefabricated building components based on BIM is designed and constructed. Putting forward the application scheme of the coding system in each phase of the prefabricated building under the BIM technology environment, and analyzing the practical application effect in combination with specific projects for future similar projects of the same type Provide references and lessons.