提出一种针对由数字化仿形系统所采集的工件表面数据直接进行空间刀补的方法．采集过程中，除了记录点的坐标外，相对应的测头压偏量也被记录下来．运用空间矢量运算得到表面上各点的法矢，进行空间刀补．利用此方法设计了一套数据处理软件系统，实现了阴阳模配对加工等功能．它具有占用内存小、运行速度快、使用简单、可靠的优点 Aiming at the method of directing the space by the surface data collected by the digital profiling system. Acquisition process, in addition to record the coordinates of the point, the corresponding pressure off the probe is also recorded. Using space vector operations to get the surface of the normals of each point, space knife compensation. Using this method, a set of data processing software system has been designed to realize the function of matching yin and yang molds. It has the advantages of small memory, fast operation, easy to use and reliable