Abstract: The economic cost of power terminal communication access network, as one of the important reference indicators to guide the construction of power terminal communication access network, has an important impact on the construction of communication access network and guiding significance. In this paper, the limited conditions of economic analysis are defined, then the distribution values of distribution automation and power information collection services under the coverage area of the base station of the wireless private network are presented, and the expression of the total distances from distribution automation service terminals to optical line terminal (OLT) is established. Then, a mathematical analysis model is established for the coverage area of optical fiber private network, and the economic conditions of using optical fiber private network and wireless private network are compared. Finally, taking the region A as an example, combined with the data of a province, the paper analyzes the specific economic cost of distribution automation and power information collection in three ways: optical fiber private network, wireless private network and optical fiber private network + wireless public network. The result shows that the wireless private network is the lowest economic cost mode in the distribution automation, and the optical fiber private network + wireless public network is the lowest economic cost mode in the power information collection. According to the two services, the wireless private network is the lowest economic cost mode while the optical fiber private network is the highest one.