The invention discloses a self-lifting type large-tonnage six-split wire lifting device. The self-lifting type large-tonnage six-split wire lifting device comprises a wire lifting device body. Two wire clamping grooves are formed in the upper end of the wire lifting device body at a spaced mode, two short lifting hooks and two long lifting hooks are arranged at the lower end of the wire lifting device body at intervals, the wire lifting device body is fixedly connected with a lower hydraulic lead screw, and the lower hydraulic lead screw is connected with an upper hydraulic lead screw through an insulating rope or an insulating rod. The two wire clamping grooves, the two short lifting hooks and the two long lifting hooks are equivalently and symmetrically arranged along the perpendicular bisector of the wire lifting device body, and the wire clamping points of the two wire clamping grooves, the two short lifting hooks and the two long lifting hooks are located on the same circumference. A creative six-split wire lifting hook and a large-tonnage hydraulic wire tightening device are integrally designed, the distance by which a metal tool is in short circuit with the air gap in the hot-line work process is shortened, and the safe distance of the hot-line work is guaranteed. In addition, the iso-electric level operation is simple, time is saved, labor intensity is reduced, and personnel and equipment safety is guaranteed.