介绍解多元非线性方程组的严格Ｂｒｏｙｄｅｎ法，并以三效并流蒸发过程模拟为例，给出其计算模型、计算框图、计算过程和计算结果．与牛顿拉夫森法相比，收敛稳定性大大提高（几乎没有发散问题）；与简单的Ｂｒｏｙｄｅｎ法相比，收敛速度大大加快（平均收敛迭代次数减少一半以上）；改进了多效蒸发过程模拟的计算方法，提高了计算质量． The strict Broyden method for solving multivariate nonlinear equations is introduced. The calculation model, calculation block diagram, calculation process and calculation results are given based on the simulation of three-effect cocurrent evaporation process. Compared with the Newton-Raphson method, the convergence stability is greatly improved (almost no divergence problem). Compared with the simple Broyden method, the convergence speed is greatly accelerated (the average number of convergence iterations is reduced by more than half); and the calculation of the multi-effect evaporation process simulation is improved Method, improve the quality of calculation.