CATIA V6 is a CAD/CAE/CAM integrated software owned by Dassault Systèmes. It is suitable for conceptual design of complex modeling and large-scale construction projects, and can realize various design functions such as space surface modeling and analysis. Based on this, this article uses Dassault Systèmes' CATIA modeling software to create steel structure bridges and realizes the development of information technology from the perspective of manufacturing.