The content of the study is : 1 this paper bring forward the creative thinking of general classification for modeling based on features which can describe the geometrical model of work piece and building the universal model repository for the objects of nc simulation depended on the modules of vrml . then the software module for nc simulation is acquired through edits the codes of vrml language commingled with javascript , which can display accurate and interactive animation of simulation for the process of turning 本文在vrml数控仿真系统的核心领域的研究中取得了一定的成果,主要内容有: 1提出了基于特征造型的抽象细分法,描述仿真对象的几何模型,以vrml组件化编程技术支持通用仿真模型类型库,构造网络虚拟现实加工仿真环境的新颖思想,并以vrml混合编程技术编制出数控车削仿真软件模块。