The utility model aims to solve the problem that the electric conductivity of a cable is lost and unstable in the butt joint process. The novel welding type polyethylene cable joint comprises a cablegroup, a filling layer and an outer sheath, and is characterized in that the filling layer is arranged between the cable group and a wrapping layer, an inner sheath layer is arranged on the outer sideof the wrapping layer, a steel armor layer is arranged on the outer side of the inner sheath layer, and the outer sheath is arranged on the outer side of the steel armor layer.