Based on the structural geometric characteristics of the S-type web wheel of the rail vehicle, two interactive parameterized model dialogs of the S-type web wheel were designed by using AutoLISP and DCL language on the AutoCAD platform under its secondary development environment. The two-dimensional cross-section of the S-type web wheel could be automatically generated in the process of optimizing the geometry of the S-type web wheel. The work of repeatedly drawing the two-dimensional CAD drawing of the cross-section was avoided when the structure of the wheel was changed which improved the efficiency of drawing the S-type web wheel and provided the basic geometric model for the three-dimensional modeling of the wheel structure and the FE stress analysis of the structure.