对多横模复折射率波导 ,提出了一个将实折射率数值法、微扰法和打靶法有机结合起来的RPS法 ,该方法简单实用 ,求解速度快 ,精度高 ,无须在整个复平面上寻找导波模式的复传播常数。通过五层平板波导计算表明 ,该方法可以精确地求得复折射率波导的所有TE和TM模式 For the multi-transverse mode complex refractive index waveguide, an RPS method is proposed which combines the real refractive index numerical method, the perturbation method and the shooting method. The method is simple and practical, and has the advantages of fast solution and high precision, and does not need to be applied on the entire complex plane Find the complex propagation constant of the guided wave mode. The calculation of five-layer slab waveguide shows that this method can accurately calculate all TE and TM modes of the complex refractive index waveguide