The invention belongs to the technical field of electric power de-icing equipment, and provides a de-icing apparatus for a power supply electric wire and cable. The de-icing apparatus comprises a de-icing mechanism, a filling mechanism, a heating mechanism and a supporting mechanism; the de-icing mechanism comprises a plurality of de-icing broom bundles, a fixed ring, a plurality of supporting rods, a first hasp lock and a surrounding ring; a plurality of fixed screw holes are formed in the fixed ring; the multiple fixed screw holes are formed in the exterior of the fixed ring in an annular array manner; the multiple de-icing broom bundles are provided with fixed sleeves; the fixed sleeves are arranged on the outer walls of the corresponding de-icing broom bundles; and the filling mechanism comprises a filling layer, a wrapping layer and a second hasp lock. The de-icing apparatus for the power supply electric wire and cable provided by the invention is good in de-icing effect, without damaging the power supply electric wire and cable; and meanwhile, the de-icing apparatus is relatively low in cost and can satisfy de-icing requirements of power supply electric wires and cables of different specifications.