Abstract: In order to achieve rapidity and standardization drawing in rigid catenary design for the urban rail transit,an aided drawing software was designed based on the AutoCAD secondary development technology. The software was developed on Visual Studio 2008 and programmed with the ObjectARX. The form of the anchoring section was summarized, and the standard anchor sections database was established. The auxiliary drawing software calls the prestored hanging point coordinates in the database through the Excel COM component to implement the parameterization and standardized drawing of the rigid catenary. The research results and the software developed have been applied to practical engineering, which improves the efficiency and accuracy of drawing.