During the completion and handover progress of BIM application in construction engineering, a BIM completion model is required for submission. Based on the previous research on project completion delivery and BIM application process of decoration engineering, this paper applies different methods of literature review, comparison and practice to study the completion delivery and application of BIM completion delivery model for building decoration engineering. Through the analysis and comparison of the completion and delivery requirements before and after BIM application, as well as considering the engineering practice, the delivery process and delivery content after BIM application is summarized. By using the completion BIM model for settle accounts and final accounts, relevant experiences are concluded for references of other building decoration engineering.