Preparation method of high-conductivity copper wire containing spiral continuous graphene layer

The invention provides a preparation method of a conductive copper wire containing a spiral continuous graphene layer, which comprises the following steps of: winding a graphene-copper composite foil into a graphene-copper composite foil roll, and drawing and extruding through hot extrusion forming to obtain a conductive copper wire precursor wire containing the continuous graphene layer; and carrying out heat treatment on the conductive copper wire precursor wire containing the continuous graphene layer obtained in the previous step to obtain the conductive copper wire containing the spiral continuous graphene layer. One-step forming conversion from the copper foil containing the graphene to the composite copper wire is achieved, a spiral winding mode and a subsequent hot extrusion forming process are adopted, the stability of the transverse size during forming is guaranteed to the maximum extent, the continuity of the graphene in the copper wire is guaranteed, and continuous production from the copper foil