应用图论理论 ,对给水管网平差环方程法进行分析 ,给出了连续性方程的显式表达式 ,与能量方程构成了改进方法的基本方程 .线性化后采用高斯 -赛德尔法求解 .而对能量方程作不同简化可得到Hardy Cross法及其他算法 .此方法简单 ,计算量小 ,且准备工作有条理 ,易于编程 Applying the theory of graph theory, this paper analyzes the adjustment equation of water supply network adjustment loop, gives the explicit formula of continuity equation, and the energy equation forms the basic equation of the improved method. After the linearization, Gauss-Seidel method is used to solve .However, the Hardy Cross method and other algorithms can be obtained by simplifying the energy equations. The method is simple, the calculation is small, and the preparation is organized and easy to program