Novel metal sheath of power cable

The utility model discloses a novel metal sheath of a power cable, which comprises a sheath with a wavy axial section and a filling layer filled in the inner side of the sheath, the filling layer fills and levels up the inner side of the sheath, so that a smooth cylindrical inner cavity is formed in the sheath, and the cylindrical inner cavity and the sheath are approximately coaxially arranged. The advantages of the corrugated aluminum sheath and the flat plate aluminum sheath are integrated; the outer surface structure style of the corrugated aluminum sheath is continued, and the inner surface structure style of the flat plate aluminum sheath is combined; wherein the sheath outer surface is in a wave shape on the axial cross section, the filling layer fills the inner side of the sheath to form a smooth cylindrical inner cavity, a gap between the metal sheath and the semi-conductive waterproof layer is electrically eliminated to enable the gap to be equipotential, and ablation damagecaused by partial dischar