Based on CAD softwareUnigraphics,approaches and methodsof three-dimensional modeling design for car are researched and thethree-dimensional model of minicar are established.

• 目前，计算几何学已在CAD软件中应用得比较成熟，本文针对所选用的CAD软件UG对轿车车身三维造型的步骤和方法进行了探讨，总结出了一些基本原则，并完成了微型轿车车身的三维造型。