Medium-voltage aluminum alloy overhead insulated cable and preparation method thereof

The invention relates to the technical field of cables, and specifically discloses a medium-voltage aluminum alloy overhead insulated cable and a preparation method thereof. The medium-voltage aluminum alloy overhead insulated cable comprises a cable core, wherein the cable core comprises a conductor, an inner shielding layer coating the conductor and an insulating layer coating the inner shielding layer, the conductor comprises a circular single core layer arranged at the center and at least two compressing layers sequentially arranged outside the circular single core layer, each compressinglayer comprises a plurality of stranded molded wire conductors, and the molded wire conductors of the adjacent two compressing layers are arranged in a mutually staggered manner, so that the performance stability of the cable is effectively improved. The medium-voltage aluminum alloy overhead insulated cable is extruded and molded by adopting a three-layer co-extrusion mode, a connecting piece ofan extruding machine and a