Abstract: This study addresses the complexity of bolted spherical joint structures in steel space frames by proposing a parametric modeling solution based on Revit platform's secondary development technology. By integrating the advantages of BIM technology and steel space frame modeling, an external command module was developed using the Revit API, enabling data interaction between the Building Information Model (BIM) and a WPF user interface. The study focuses on solving the parametric modeling of key components of the frame joints, utilizing type parameters and logical functions within the Revit platform to automate and intelligently adjust the joint models. A visual human-computer interaction system was constructed through the development of a user interface and external commands, allowing designers to adjust the geometric parameters and material properties of space frame joints in real-time via a graphical user interface, with dynamic model updates driven by parameters. Experimental results demonstrate that this method significantly enhances the design efficiency of space frame joints, ensuring the accuracy and consistency of design data, and provides a new solution for the parametric design of complex spatial structures.