Outdoor, AC and high voltage isolation switch

The utility model relates to an outdoor AC high-voltage isolating switch, which mainly comprises an insulator arranged on a V-shaped supporting column of a base and a switch knife back mechanism on the top end of the insulator. Since a switch knife back of a circular tube body of the existing product has the technical problems of small heat dissipation area, nonuniform current density, severe partial heat generation and deformation and inaccurate switch fit, the outdoor AC high-voltage isolating switch of the utility model uses two plate-shaped conductive bodies which are fixed together in parallel to form a splint type switch knife board structure, the utility model not only has the capability of resisting deformation in vertical direction, but also has uniform current density and favorable heat dissipation performance, the reliability and the stability of the mechanical fit of a switch knife board are ensured, and the service life of the utility model is prolonged.