本文给出了一种计算抛物面索网天线型面精度与投影网格边长关系的方法。在天线反射面的光学口径面内,将其内接正六边形用正三角形进行划分,设定正三角形网格的边长,编制matlab程序,依次计算各区域对应的型面精度值,得到整个天线型面精度与投影网格边长的关系。通过与传统网面精度计算公式相比较,证明了本方法的有效性与正确性。 This paper presents a method to calculate the relationship between the parabola cable aerial profile and the projection grid side length. In the optical aperture plane of the antenna reflection surface, divide the inner regular hexagon into regular triangles, and set the side length of the regular triangle grid. Compile the matlab program, and then calculate the corresponding surface precision value of each area to get the whole Relationship Between the Accuracy of Antenna Profile and Side Length of Projection Mesh. By comparing with traditional mesh surface precision calculation formula, the method is proved to be effective and correct.