United States, Singapore, Japan, Korea and other countries have proposed Building Information Modeling (BIM) application requirements and the establishment of national application of BIM standards in the construction industry. The introduction of BIM technology in China is later and is not yet mature. BIM is currently applied in various industries, particularly in the construction and hydropower industries. All subordinate units of China Railway Corporation have also carried out part of the BIM technology research and application of practical work with several pilot projects. Taking a project engineering as background with the creation of three-dimensional model of the bridge piers rebar, this article introduces Computer-Aided Three-dimensional Interactive Application (CATIA) and advanced knowledge engineering applications in steel bridge BIM Modeling. This application method can quickly create different types of steel piers within the complex structure.Compared with the general three-dimensional modeling methods, it is more efficient, convenient and greatly improves the efficiency of the designer. It also provides important basic information for subsequent simulation in virtual construction, construction technology guidance, information technology and other aspects of construction.