本文提出单位长度管线造价及管网能耗即环状管网年动力费的计算方法.用电算按最小二乘法用非线性函数或管径幂的多项式拟合单位长度管线已知造价,提高了计算结果与已知值的总体符合程度.根据管网的组成,提出环状管网能量平衡关系,三种不同类型管网的计算结果表明,本文提出的计算方法符合管网的实际情况. In this paper, the calculation method of unit length pipeline cost and pipe network energy consumption, which is the annual power cost of a circular pipe network, is proposed.The least cost method is used to fit the unit length pipeline with polynomials of nonlinear function or pipe diameter power According to the composition of the pipe network, the energy balance of the ring pipe network is proposed, and the calculation results of the three different types of pipe networks show that the calculation method proposed in this paper is in line with the actual situation of the pipe network.