导弹天线罩的精密加工，属于自由曲面精密加工的范畴，它对 天线罩以及导弹的性能起着至关重要的作用。根据测量所得的天线罩几何表面的离散数据点 ，结合对其综合电气性能测试数据的处理和分析，实现原始曲面的重构，并由此构造出要求 的曲面，再进行分析和规划，实现按需去除加工，是实现对其精密加工的关键。以双三次B 样条曲面方法为工具，利用其良好的几何特性以及简单有效的算法，实现了天线罩廓形曲面的重构，为在计算机上实现曲面绘制提供了理论基础。求算的等距面方程，为数控加工中刀具轨迹的规划奠定了基础。 The precision machining of the missile radome belongs to the category of precision machining of freeform surfaces and plays a crucial role in the performance of radomes and missiles. According to the measured discrete data points of the geometric surface of the radome, combined with the processing and analysis of its comprehensive electrical performance test data, the reconstruction of the original surface is realized, and the required surface is constructed, analyzed and planned, Need to remove the processing, is the key to its precision machining. With the double cubic B-spline surface method as a tool, the geometrical properties of the radome and the simple and effective algorithm are used to realize the reconstruction of the radome profile surface, which provides a theoretical basis for the surface rendering in the computer. Calculated isosceles surface equation for CNC machining tool path planning laid the foundation.