For the purpose of solving the safety power supply problem that is leakage fault selection in the mine distribution network system,we proposed a single-phase ground fault selection method based on transient signal features identification technology.In this paper,the line transient zero-sequence current signal is analyzed with the variational modal decomposition algorithm,which develops a fault selection criterion combining the mode maximum polarity of the feature modal component and the line modal energy weight factor discrepancy.With different fault triggering conditions, the simulation of mine distribution network system is conducted.The results demonstrated that the selection method is not affected by the fault closing angle,ground resistance,and arc suppression coil compensation,which can be realized in fault line identification and provides excellent engineering adaptability.