主要介绍用户应用AutoLISP语言进行AutoCAD的二次开发，编写连接紧固件中的内六角螺钉参数化绘图程序，内六角螺钉是常用的标准件。-This paper introduces a concrete example of user applications for AutoCAD s AutoLISP language secondary development, the preparation of the bolt fastener to connect the parameters of mapping procedures, Hexagon screw is a commonly used standard。