The invention discloses a polymetallic ultra-light covered wire, which consists of two insulated wire cores stranded. Each insulated wire core consists of a conductive reinforced core and a protective insulating layer covered outside the conductive reinforced core, wherein the conductive reinforced core consists of three copper-clad aluminum conductor conductive cores and four copper-clad steel conductor reinforced cores which are mixed and stranded; and linear polyethylene with low density is adopted as the insulating layer. The polymetallic ultra-light covered wire can simultaneously meet conductivity and mechanical performance and reduce the weight of a product, adopts the linear polyethylene with the low density as the insulating layer so as to meet the insulating performance, reduce the weight of the product and also improve the environment resistance of the product; The polymetallic ultra-light covered wire can work under the conditions of high temperature, high humidity and low temperature for a long time, has the advantages of good mechanical performance, light weight, small outer diameter, stable transmission quality, and quick and convenient succession, and is applied to engine-driven quick stretching and releasing operations.