The invention relates to the field of power transmission line dismounting tools and provides a dismounting tool for an outdoor high-voltage current-limiting fuse. The dismounting tool comprises two lead screws and two pressing plates, wherein a U-shaped opening is formed in the middle part of each pressing plate, holes are respectively formed in the two ends of each pressing plate, and the two pressing plates are arranged correspondingly; the two ends of each of the two lead screws are correspondingly inserted into the holes of the two pressing plates respectively; nuts, which are located at the outer sides of the two pressing plates, respectively sleeve each lead screw. During use, the U-shaped openings of the two pressing plates are snapped onto wiring terminals of the two ends of the high-voltage current-limiting fuse, the nuts are turned, and the pressing plates at the two ends of the high-voltage fuse are pressed inwards through the two pressing plates, so that bolts on two wiring terminal caps are disassembled more easily, the efficiency of operation is increased, and the safety of operation is improved; in addition, the dismounting tool is simple in structure and low in cost and is applicable to popularization.