The utility model relates to medical equipment, the vagina scope leak protection water installation that specifically says so, including pasting in the square sheet rubber of perineal body, be equipped with a base in this sheet rubber center, this base upside sealing connection has an operation support, and the vagina scope mirror body passes the operation support in proper order and the base stretches into the vagina, be formed with the cavity between the base AND operation support, cavity side wall is provided with the switching device who opens or close this cavity. The utility model discloses a base can make things convenient for nimble entering of the mirror body of different thicknesses to set up the rubber tube at the base downside, not only be favorable to guiding the mirror body to get into the vagina, except being used for simple vagina scope case, still include the case of not damaged hymen hysteroscope moreover, the peripheral square sheet rubber of base pastes in the perineal body simultaneously, can avoid uterine -distention liquid to spill.