AutoCAD provides a programming model that enables efficient drafting in batch processing and powerful graphics capabilities for applications. Programmatically controlled AutoCAD drawings, usually VB/VBA drawing using its object model’s automated interface, its program execution performance is relatively low. The method of Delphi drawing through the dual interface of the object model provided by AutoCAD is proposed, and the specific implementation of typical examples is given. The example results show that the Delphi drawing method not only provides programming flexibility, but also makes the application have high execution performance, which provides a new way for programming and controlling AutoCAD drawing.