The invention discloses a vertically-opening ice breaking high-voltage isolation switch. The upper portion of an operation pull bar (11) is in hinged connection with one end of an ice breaking connecting rod (10). The other end of the ice breaking connecting rod (10) is in hinged connection with an ice breaking claw (7). The ice breaking claw (7) which can slide longitudinally along the surface of a conductive arm moving contact is arranged on the inner side of a moving contact area of a conductive arm (12). The tail portion of the ice breaking claw (7) is in hinged connection with the ice breaking connecting rod (10). The other end of the ice breaking connecting rod (10) is in hinged connection with the operation pull bar (11). According to the invention, through utilization of characteristics of relatively low shearing intensity of ice, motions of the moving contact pull bar simultaneously drives the motions of an ice breaking mechanism so as to realize ice breaking of the moving contact in a closing process; then the moving contact which is without ice carries out ice breaking on the static contact under working of the operation mechanism. The structure is simple and reasonable; the working is reliable; and requirements of rapid ice breaking can be satisfied.