The product of this project is a conductive plastic made of PE and PVC resin as the base material, adding nano-level conductive carbon black, through the toughening technology, through a special manufacturing process, mixed plasticization and granulation, the product's physical properties and process extrusion characteristics The sheath standards of PE and PVC are quoted, especially the thin-walled double-layer co-extrusion surface is smooth and round, and it is tightly bonded with the insulating layer without interface reaction, which is conducive to the special requirements of ultra-high voltage cables.