The utility model relates to a water bar's supplementary lifting device is changed to heating furnace belongs to heating furnace equipment technical field. Technical scheme is: be equipped with many parallel arrangement's horizontal steel wire (8) and many parallel arrangement's vertical wire rope (9) respectively along the radial of water roof beam (6) and axial, the one end of horizontal steel wire (8) is passed through positioning pin (3) and is fixed on heating furnace body, and the other end of horizontal steel wire (8) passes through chain block (2) and heating furnace beam column (1) is taut is connected, one (5) the winding on one end and the heating furnace stand of vertical wire rope (9) is connected, the other end of vertical wire rope (9) with through two (7) taut connections of chain block no. 2 and heating furnace stand, chain block no. 3 upward string is established to transversely wire rope (8) and vertical a plurality of water roof beam hoisting points (4) in the intersect constitution stove of wire rope (9), water roof beam hoisting point (4). The beneficial effects of the utility model are that: the convenience is demolishd, is installed and the work of having bad luck water bar.