Take a case of the special-shaped steel structure roof with hyperbolic variable section beam as an example, this paper expounds the modeling mechanism of Revit and Grasshopper plug-ins to create hyperbolic variable section beam respectively, which verifies the feasibility of rapid modeling of Grasshopper program. After picking up three-dimensional linear model for segmentation and inputting corner coordinates to create two sections with different shape and size, the beam sections curves respectively are placed vertically on the segment after three groups of line segment. The results show that the lofting command and Boolean difference command can be used to quickly generate a batch of special-shaped steel structure roof models, which greatly improves the modeling efficiency by saving model modification time with high practicability.