The utility model relates to a clamp for a vertical shunt wire of a 10kV isolating switch. The wire clamp comprises a wire clamp main body, a conductive sliding block, a sliding block screw rod, an operating rod joint, a soft copper wire joint, a soft copper wire and a joint jackscrew, the wire clamp body comprises a base and a supporting arm which are of an integrated structure. A sliding block screw rod is arranged on the base; the top of the slider screw is movably connected with a conductive slider; the conductive slide block is adjusted to slide up and down through the slide block screw;a guide column is arranged on the conductive sliding block, a sliding way is arranged on the side wall of the supporting arm, in the sliding process of the conductive sliding block, the guide column slides in the sliding way all the time, two through threaded holes are formed in one side of the base, annealed copper wire connectors are connected in the threaded holes and connected with annealed copper wires in a pressed mode, and bolts on the other side of the base are connected with operating rod connectors. The device is not limited by copper-aluminum wires, is suitable for direct connectionof various 10kV isolating switch vertical shunt wires, can meet the requirement of 70-240mm copper-aluminum wire sections connected with 10kV isolating switches, and is convenient to assemble and disassemble and safe and reliable in performance.