分别对２根对称单模光纤耦合率与其数值孔径、最小间距、弯曲半径、垂直偏移等参量的响应特性作了计算，对计算结果作了扼要分析，为用户制作优质光纤耦合器提供了依据和方便的计算数据． The response characteristics of two symmetric single-mode fiber coupling rates and their numerical aperture, minimum spacing, bending radius and vertical offset were calculated. The calculation results were briefly analyzed, which provided a basis for the user to make a good fiber coupler And convenient calculation of data.