The utility model discloses a high -voltage isolation switch, including shell, crankcase, overload limiter and pressure switch, shell, crankcase and overload limiter follow supreme fixed connection down in proper order, pressure switch establishes in crankcase one side, be provided with the conductor in the shell, be provided with insulator, sliding contact and static contact on the conductor, the insulator is held with the shell card and is connected, be provided with the moving contact in the sliding contact, be provided with insulator spindle and crank on the moving contact, the insulator spindle is articulated with the moving contact, crank and insulator spindle fixed connection, crank one side is provided with the turning arm, the turning arm is articulated with the crank, be provided with the control shaft in the crank, the control shaft is connected with crank drive, and this high -voltage isolation switch operation is reliable and stable, and convenient operation is insulating effectual, and is sealed effectual, the easy maintenance.