Abstract: The conventional two-dimensional CAD paradigm for metro station building design can no longer satisfy the developmental requirements of the industry. Building Information Modeling (BIM) technology can fundamentally solve many drawbacks of the 2D design paradigm and lay a solid technical foundation for cross-professional collaborative work and full-life cycle digital management of metro design. In order to break down data barriers and unlock the value of BIM, this paper develops a special software suitable for intelligent parsing of CAD drawings and BIM model generation of metro station buildings, which realizes the full-process automation of CAD drawing preprocessing, component identification and semantic mapping for metro stations, and completes the high-precision extraction of drawing information. A closed-loop data verification mechanism is established to obtain high-quality data input for BIM modeling through multi-dimensional verification, automatic exception handling and a graphical human-computer interaction interface for manual correction. Based on secondary development API interfaces, automated generation of BIM models is realized, and high-precision, compliant BIM deliverables are output in accordance with industry standards. Verified through trials in actual engineering projects, the software meets expectations in terms of work efficiency, data accuracy, operational experience and other aspects, satisfying the requirements of practical engineering applications.