Abstract
This paper is written to exemplify the basic design idea and show the design procedure of a parameter drawing. Use of AutoCAD ActiveX Automation to access AutoCAD objects and ADO to build up data communication between AutoCAD and Access the parametric drawing software program based on AutoCAD VBA is poised for realization. In the course of exploration of this subject, great improvements can be made in functionality of integration, interaction and automation of CAD system, fully meeting the requirements of engineering practice.