Abstract: The line grounding fault of the 10kV low current grounding system accounts for a large proportion in the disposal of adjustment faults, but there are a series of problems such as troubleshooting, fault positioning and large power failure range, which are easy to cause electric shock accidents. In order to quickly check and locate the ground fault point, and restore the fault-free line recovery. This paper will combine the characteristics of Dehong distribution automation line, use the remote control function of distribution automation switch, the small current grounding wire selection device action, and the programmed operation function that will be put into operation in the future, to improve the efficiency of 10kV small current grounding system line grounding fault dispatching and disposal.