Constantly development of 3D CAD technology closely relates to the mechanical design in modern mechanical design industry, and 3D CAD technology has been widely used. This article focuses on the meaning of 3D CAD technology and mechanical design, analysis of 3D CAD technology's current development and its impact on the mechanical design.%三维CAD技术的不断发展同机械设计的发展息息相关，在现代的机械设计行业中，三维CAD技术得到了广泛的应用。本文主要阐述了三维CAD技术和机械设计的含义，分析了三维CAD技术如今的发展状况，并将其对机械设计的影响进行了简单分析。
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