The invention discloses a 1kV highly-efficient energy-saving high-conductivity low-noise weather-resisting overhead insulation cable. The cable comprises a high-conductivity composite aluminum conductor which is formed by 37 high-conductivity composite aluminum filaments with diameter of 2.54mm in a '1+6+12+18' four-layer twisting manner. An irradiation crosslinked polyethylene inner insulation layer and an improved weather-resisting insulation outer insulation layer are successively extruded on the exterior of the high-conductivity aluminum conductor. Nano micro-spiral wind conducting groovesare arranged in outer surface of the improved weather-resisting insulation outer insulation layer and then a protection layer is extruded. According to the invention, the cable is good in electricalperformance, insulation performance, machinery performance, and low-noise performance, high in rigidity, capable of resisting impact and bending and good in abrasion performance.