The invention discloses a
backup-protection confection method and device of a transmission overhead ground wire for important crossed region safety. The technical scheme of the
backup-protection confection device of the transmission overhead ground wire for the important crossed region safety is that a main force bearing fixed cable clamp is arranged at the end of an overhead ground wire, and hinged to a transmission pole
tower fixed plate through a U-shaped hanging ring and a connecting bolt, furthermore, a
backup protection device is arranged on the overhead ground wire close to a transmission pole
tower, and comprises a backup fixed cable clamp and an extension rod, wherein the backup fixed cable clamp is fastened together with the overhead ground wire, in addition, the backup fixed cable clamp is hinged to one end of a connecting plate, the other end of the connecting plate is hinged to one end of the extension rod, and the other end of the extension rod is connected with the transmission pole
tower fixed plate through a connector to form dual-protection connection. By adopting the backup-protection confection device of the transmission overhead ground wire for the important crossed region safety disclosed by the invention, faults and the fault-trip times of a
transmission line are effectively lowered, the outage time of a
power grid is reduced, and the power supply quality of the
power grid and the customer satisfaction are improved.