Automatic phase selection knife switch

The invention discloses an automatic phase selection knife switch. The automatic phase selection knife switch comprises at least two sets of knife switch assemblies; one end of each knife switch assembly is connected with a ground wire, and the other end is connected with a ground wire ice melting automatic wiring device; each knife switch assembly comprises a knife switch, a transmission shaft, amain control box, a remote control box, a knife switch protective box, a wire locking cabinet and a knife switch connecting tower assembly; the knife switch is fixed in the knife switch protective box; the knife switch connecting tower assembly is arranged below the knife switch protection box; the knife switch is mounted on an iron tower; the transmission shaft is connected with the lower part of the knife switch; the lower end of the transmission shaft is connected with the main control box; the main control box is connected with a direct-current power supply through a power wire; the wirelocking cabinet is arrange