从曲面数控仿形测量的要求出发，介绍了激光测头曲面仿形测量的实现方法。提出了基于测量区域预测，曲面近似数学模型建立的方法，结合测点预测、误差补偿等技术，在“华中Ⅰ型高性能数控系统”上成功地实现了点光源激光非接触测头的Ｚ浮准等弧长仿形测量 Starting from the requirement of surface profile measurement, the realization method of surface profile measurement of laser probe is introduced. A method based on the prediction of the measurement area and the establishment of a mathematic model of the surface approximation was proposed. Based on the techniques of measuring point prediction and error compensation, the Z floatation of point source laser non-contact probe was successfully achieved in “Huazhong Ⅰ High Performance Numerical Control System” Quasi-arc length profiling measurement