This paper analyzes the patent application status in the field of BIM, including the trend of patent application, the distribution of applicant types, the technical distribution and development of major applicants, by means of collecting, indexing and carding the patent documentsin the field of BIM. According to the technical branch of the BIM patent application that is summarized and analyzed, such as system integration, model optimization, construction management optimization, construction scheme optimization, system development and so on, the patent technology development of several representative applicantsis reviewed and analyzed.