The utility model discloses a tool for replacing a fuse tube of a drop-out fuse, belonging to the technical field of overhead line maintenance tools. The tool comprises an insulation operation bar and a transverse pull bar. The tool is characterized in that a clamp is disposed on the upper part of the insulation operation bar; and the clamp is formed by symmetric clamp plates, which are in hinged joint on one sides and are connected by bolts on the other sides. The tool has the beneficial effect that the fuse tube is prevented from swinging left and right, so that fatal accidents, such as people and equipment being damaged by the fuse tube which falls from height, are avoided. Besides, the tool is structurally simple, safe, reliable, and highly practical.