Gas insulation metal enclosed switch

The utility model relates to a gas insulation metal enclosed switch which comprises a main bus and an insulation switch. An electrical connection part of the main bus comprises a static contact base which is provided with an inner hole for installing a conducting rod. The conducting rod is inserted into the inner hole for installing the conducting rod. The electrical connection part of the insulation switch comprises a dynamic contact pedestal. One end of the step inner hole of the dynamic contact pedestal is fixedly provided with a contact finger pedestal. The circumferential surface of the inner hole of the static contact pedestal, which is used for installing the conducting rod, is provided with a first guide ring at the insertion end of the conducting rod. The first guide ring performs guiding function for preventing joint squeezing of electric rod or scratch of spring contact finger when the joint of the conducting rod is inserted into the inner hole of the static contact pedestal, which is used for installing the conducting rod.