Abstract: According to the application situation of distribution automation, this paper combs the application characteristics of several typical feeder automation modes, and combining with the present situation of Hunan power grid, puts forward the practical technical route of distribution automation of "main feeder automation and branch line relay protection", the principle of configuration technology is established, and the practical application is carried out. The typical application cases show that the technical scheme can effectively support the objectives of "two reduction and one control", that is, to reduce the power cut of 10 kV whole line, to reduce the power cut of distribution station and to control the time of distribution transformer outage. Finally, in view of the problems existing in the practical practice, the paper puts forward some suggestions for the next stage.