防毒面具中的罩体和阻水罩均是不规则几何形体，以往由其结构特点决定了设计手段只能是手工完成，所以效率不高、质量欠佳，模具的制造也很困难。本文尝试应用CAD技术解决这一问题，选用CV公司的PersonalDesignerR6．1为工具，在计算机上初步建立了面具罩体和阻水罩及模具的三维立体模型并实现了直观显示、交互设计及实时修改等功能。 Gas masks in the cover and water blocking cover are irregular geometric shape, the past by its structural characteristics of the design means can only be done by hand, so inefficient, poor quality, the manufacture of the mold is also very difficult. This article attempts to use CAD technology to solve this problem, the CV company’s PersonalDesignerR6.1 as a tool, the initial establishment of the mask on the computer mask and water mask and the three-dimensional model of the mold and to achieve a visual display, interactive design and real-time changes And other functions.