将实际工程中的复杂水力计算问题归纳为对高次方程的求解,并提出快速、正确解决这类问题的数值方法——中点迭代法,对解决实际工程问题具有指导意义. The problem of complex hydraulic calculation in practical engineering is summed up as solving the high-order equation, and a numerical method called mid-point iteration method is proposed to solve these problems quickly and correctly. It is instructive for solving practical engineering problems.