The invention discloses a special large-tonnage lead lifting device for hot-line work. The special large-tonnage lead lifting device comprises a connecting plate, wherein two first hooks are arranged at two sides of the connecting plate, respectively; the middle of the connecting plate is connected with a cylinder body of a main hydraulic cylinder; the top of a push rod of the main hydraulic rod is connected with a lifting lug; two sides of the lower surface of the connecting plate are hinged with the upper ends of connecting rods, respectively; the lower ends of the connecting rods are connected with vertical hydraulic cylinders; push rods of the vertical hydraulic cylinders are connected with second hooks; one sides, which face the main hydraulic cylinder, of the second hooks are hinged with push rods of horizontal hydraulic cylinders; the horizontal hydraulic cylinders are hinged with the main hydraulic cylinder. According to the invention, the horizontal hydraulic cylinders are arranged between the main hydraulic cylinder and the second hooks, and enable the relative position between the main hydraulic cylinder and the second lifting hooks to be stable, so that an insulation layer of a lead cannot be damaged because of the shaking of the second hooks which are used for hanging and loading the lead.