The invention discloses a high-voltage line snow-removing and deicing device, which comprises a high-voltage line, an inner protection layer, a high-voltage line shell and a triangular support frame, wherein a first insulating layer coats the outer surface of the high-voltage line; the first insulating layer and the inner protection layer are filled with a compressive sponge cushion; a thermal insulating layer coats the outer surface of the second insulating layer; an electric heating wire is fixedly arranged between the outer wall of the thermal insulating layer and the inner wall of the high-voltage line shell; through holes are arranged in three corners of the triangular support frame; the high-voltage line shell penetrates through the through holes; an insulating protection box is fixedly arranged at the middle part of the triangular support frame; and a signal receiver and a controller are arranged at two ends in the insulating protection box respectively. The high-voltage line snow-removing and deicing device can melt ice and snow through the electric heating wire; the snow-removing and deicing effects are obvious; the electric heating wire can be remotely controlled to heat by manpower; the operation is simple; and freezing of the ice and the snow on the line can be completely eradicated.