测量三维曲面轮廓的传统方法是采用表面轮廓仪式或三坐标机。改进的方法是将激光三角测量头装在三坐标机上以代替触针，从而实现了非接触测量，但此法仍然受到三坐标机本身的限制。本文在深入研究激光三角测量原理的基础上，提出了一种三维曲面的激光双三角测量法，并给出了设计要点。 The traditional method of measuring the outline of a three-dimensional surface is to use surface profile ritual or coordinate systems. The improved method is to install the laser triangulation head on the CMM instead of the stylus to realize the non-contact measurement, but the method is still limited by the CMM itself. Based on the deep research of laser triangulation theory, this paper presents a laser double triangulation method of three-dimensional surface and gives the design points.