Discharging method, device and system of overhead line system and storage medium

The invention relates to the technical field of rail transit detection, and discloses an overhead line system discharging method, device and discharging system and a storage medium, which are used for improving the operation safety of overhead line system discharging. The discharging method of the contact network is applied to a discharging system, the discharging system comprises at least one electricity testing assembly and a discharger, and the discharging method of the contact network comprises the steps of detecting whether the discharging system has an electricity testing identifier or not and whether an isolating switch of the contact network is in an open position or not, and detecting whether the contact network is electrified or not through the at least one electricity testing assembly; and if it is detected that the discharge system has the electricity verification mark, the disconnecting switch is in an open position and the overhead line system is electrified, a discharger is controlled through a