锅炉钢架工程呈现出大型化、复杂化特征，传统二维施工图纸无法满足工程需求。针对钢结构中二维图纸三维表达的缺陷，提出了一种锅炉钢架三维参数化建模方法。该方法采用CATIA软件二次开发技术，利用二维图纸信息建立三维模型，并依照工程管理统计方法，设计工程零件的管理系统。该管理系统可实现锅炉钢架三维参数化建模，直观地反映出工程结构，减少零件放样与零件预安装过程，并可对零件进行统计管理。

The boiler steel frame tends to be larger in scale and more complicated in system. Traditional 2D drawings can hardly satisfy the requirement of structural constructions. This article focuses on the imperfections of 2D drawings in expressing 3D images, and a 3D parametric modeling method for boiler steel frame is proposed. Based on the secondary development of CATIA software, the 3D models is constructed with the information given by 2D drawings. Meanwhile, a management system for engineering assembly parts is designed according to statistical methods of engineering management, by which the 3D parametric modeling for boiler steel frame is realized, the overall situation of the engineering structure intuitively embodied, the statistical management for the parts acquired, and the lofting and pre-erection outfitting for the parts are avoided .