The 14th Five-Year Plan has put forward the new requirement of "accelerating digital development", and it is urgent for the construction industry to realize digital transformation and upgrading. BIM Technology is the bottom data information of building digitization. BIM Technology is widely used in rerecord design at present stage, which is contrary to the original intention of digital construction and hinders the rapid development of digital construction. Therefore, the promotion of BIM top-down design is the key to the digital information construction of architectural design industry.Currently, BIM positive design is being gradually implemented by individual large design institutes and large real estate enterprises, but its experience has not been widely popularized. This paper summarizes the results of BIM positive design in design institutes through the practice of construction drawing positive design of specific projects, and provides experience for the development and promotion of positive design and digital transformation and upgrading of construction enterprises.