The invention discloses a conductor material for an ultrahigh-pressure power cable. The conductor material is prepared from the following elements in percentage by mass: 65-75 percent of Al, 20-30 percent of Cu, 2-3.5 percent of Mg, 0.5-0.8 percent of RE, 0.3-0.5 percent of In, 0.1-0.2 percent of Ce and 0.1-0.2 percent of Co. an obtained conductor is lower than a pure copper conductor by 30-40 percent in cost, is low in electrical resistivity, large in tensile strength, high in elasticity modulus and small in density and is suitable for being used as the conductor material for the ultrahigh-pressure cable.