The invention relates to a power transmission line skin barrier removing device, and belongs to the technical field of electric power equipment. The barrier removing device comprises an inner cleaning cylinder and an outer driving cylinder, wherein the inner cleaning cylinder and the outer driving cylinder are concentrically arranged; a power transmission line penetrates through the inner cleaning cylinder, and a counterweight motor is installed on the outer driving cylinder; the output end of the counterweight motor stretches into the outer driving cylinder to drive a driving gear to be meshed with an annular gear on the outer wall of the inner cleaning cylinder to rotate; the inner cleaning cylinder drives cutters on the outer circumferences at the two ends of the inner cleaning cylinder to rotate, and a power transmission line external barrier removing unit is formed; the rotation of the inner cleaning cylinder drives a rotary gear which penetrates through the wall of the inner cleaning cylinder and is arranged at the outer end of a rotating shaft to operate along a guide gear on the inner wall of the outer driving cylinder; the rotary gear drives a smashing mechanism to smash attachments along the surface of a power transmission line through the rotating shaft; the smashing mechanism comprises a rotary shaft with a smashing knife at the tail end and a floating net cover fixed at the tail end of the rotary shaft through a spring. The power transmission line skin barrier removing device can remove the attachments on the skin of the power transmission line, external suspension objects and approaching objects, and the removing effect is good.