The utility model discloses a wisdom high voltage power cable's for energy graphene modification iron shielded layer structure, including welded corrugated metallic sheath and the graphite alkene coating of coating at the corrugated metallic sheath internal surface, perhaps include the crowded corrugated metallic sheath who wraps, coat at the graphite alkene coating and the isolated protective layer of winding in graphite alkene coating outside of corrugated metallic sheath surface, the thickness of graphite alkene coating is 0.001~0.002mm. The utility model discloses a coating of superconductive graphite alkene comes the iron shielded layer as the cable in the structure on corrugated metallic sheath surface, has effectively reduced the temperature rise that arouses when the cable takes place short -circuit fault, and it provides safer guarantee to use the operation of cable.