The invention relates to a marine light power cable. The cable comprises a conductor, an insulating layer, a taping, an armor layer and an outer sheath, wherein the insulating layer is made from crosslinked polyethylene or crosslinked polyolefin macromolecular insulating material, the insulating layer temperature resistant class is 95 DEG C; the insulating layer is covered outside the conductor, the insulating layer and the conductor commonly constitute the insulating core of the cable; when the number of the insulating cores is 2-4, the cable also comprises a filling strip made from low smoke and zero halogen foaming polyolefin material, the insulating cores and the filling strip are twisted together to be covered by the taping; when the number of the insulating core is one, the taping is directly covered outside the insulating layer of the insulating core; the armor layer is weaved by aluminum alloy wires and arranged outside the taping; and the outer sheath is made from crosslinkedpolyolefin macromolecular material and arranged outside the armor layer. The product of the invention has light weight, reliable performance and durability.