本文介绍一种为方便学习《机械原理》课程的齿轮传动章节而设计的ＣＡＩ课件。针对渐开线齿轮设计、加工及啮合中难以理解的内容，借助于计算机图形学工具，形象、直观地动态模拟齿轮范成加工及配对啮合时的情况。实践证明它能使学生在短的时间内，更有效地掌握齿轮传动的理论与实践内容。 This article presents a CAI courseware designed for the convenience of learning the gear chapters of the “Principles of Mechanics” course. Aiming at the hard-to-understand contents of involute gear design, machining and meshing, with the aid of computer graphics tools, the image can be directly and dynamically simulated when the gear is machined and matched. Practice has proved that it enables students to more effectively grasp the theory and practice of gear transmission in a short period of time.