The utility model relates to a floating valve belongs to the chemical industry equipment technical field of gas -liquid mass transfer separation in the chemical industry, including tetragonal valve gap and two valve leg, at least, be equipped with a tongue hole on the valve gap, the valve gap top is equipped with the baffle that the slope set up in tongue hole department, two opposite side edges of valve gap are equipped with the tooth, valve leg sets up and is close to other two side departments bottom the valve gap, two valve leg outwards heels respectively to one side, valve leg's lower extreme is equipped with the valve foot, the utility model discloses a floating valve can effectively reduce the vibration in the use, prolongs its life.