The invention discloses a high-speed switch, comprising a rack; an arc extinguishing unit which is mounted in the rack and is composed of a fixed contact and a moving contact which are arranged up and down; a switch-on buffer unit which is connected with the lower end of the moving contact and is used for providing contact force for the moving contact; a repulsion mechanism unit which is connected with the lower end of the switch-on buffer unit and comprises a switch-on limiting structure, a switch-off coil, a repulsion metal disk, a switch-on coil and a switch-off limiting structure which are arranged from top to bottom in sequence, wherein the switch-on limiting structure and the switch-off limiting structure are used for limiting a moving position of the repulsion metal disk; and a switch-off buffer unit which is arranged under the repulsion mechanism unit and is used for buffering the repulsion mechanism unit. According to the high-speed switch provided by the invention, the heading between the moving contact and the fixed contact can be avoided; the safe and reliable switch-off and switch-on performance is ensured; moreover, the impact between the repulsion metal disk and the switch-off and switch-on coils is avoided; and the mechanical life of the whole switch is improved.