在工质热物性分析中 ,经常遇到非线性方程求根的数值问题 ,总结了常见的求非线性方程根的数值计算方法 ,比较了各种算法的收敛性和收敛速度 ,对每一种算法给出了验证的计算实例 In the thermophysical property analysis of working fluid, numerical problems of finding roots of nonlinear equations are often encountered. The common numerical methods for finding the roots of nonlinear equations are summarized. The convergence and convergence rates of various algorithms are compared. The algorithm gives a calculation example of verification