The invention discloses a single-RRU rare earth alloy conductor single-electric dual-optical mixed cable assembly comprising a mixed cable and connectors arranged on two ends of the mixed cable; the mixed cable comprises a polyvinyl chloride oversheath, and an electric unit and two optical units arranged in the polyvinyl chloride oversheath; the electric unit comprises two wires; the optical unit is a dual-core single mode fiber; the conductor material of the wire is a rare earth alloy conductor; the rare earth alloy conductor is wrapped by a conductor insulation layer; a formula of the polyvinyl chloride oversheath comprises the following elements by weight parts: 32-46 parts of SG-5 polyvinyl chloride; 10-25 parts of EVA; 5-35 parts of sebacic acid dioctyl phthalate; 2-5 parts of calcium zinc composite stabilizing agent; 0.8-1.2 parts of calcium stearate; 0.2-1 parts of anti ultraviolet oxidizing agent; 5-10 parts of zinc borate fire retardant. The mixed cable assembly is applied to the single RRU system so as to greatly improve device mounting efficiency, is reasonable in structure design, can simultaneously transmit signals and power, and the rare earth alloy conductor has excellent performances of light weight, corrosion resisting, and relatively low cost.