Abstract: With the popularization and operation of distribution automation in 10 kV distribution network, the correct action of distribution automation equipment is directly related to the safe and reliable operation of 10 kV distribution network. The correct action rate of distribution automation equipment is also an important evaluation index of distribution network operation. According to a typical case of action logic error of automation equipment in 10 kV distribution network, the causes of action logic error are analyzed, and the solutions are put forward.