Abstract: Based on the Revit platform, the automatic generation algorithm of subway retaining piles was studied to improve the modeling efficiency of Revit. This article analyzed the distribution law of subway retaining piles, used C # language, obtained the locating line and layout parameters of piles by identifying the bottom drawings of CAD and the software interface, and obtained the coordinates of the center points of piles by calculating, so as to implement the automatic generation of subway retaining piles. Through testing and analysis, the subway retaining piles automatically generated by this algorithm could meet the engineering requirements and greatly improved the modeling efficiency. The results show that the secondary development based on Revit can make up for the weak specialty of BIM software and promote the application and development of BIM in China.