The invention relates to a high-pressure and high-pressure bidirectional metal sealed floating ball valve. The floating ball valve comprises a valve body, a ball body and a valve deck. The valve deck is provided with a medium inlet channel and a medium outlet channel, an inlet side valve base is arranged between the side, corresponding to the medium inlet channel, of the valve deck and the ball body, an outlet side valve base is arranged between the side, corresponding to the medium outlet channel, of the valve deck and the ball body, a U-shaped ring and a positioning ring are further arranged at the portions, corresponding to the inlet side valve base, of the outer side of the valve deck, one side of the U-shaped ring is welded to the inlet side valve base, the other side of the U-shaped ring is welded to the positioning ring, and the other side, opposite to the U-shaped ring, of the positioning ring is welded to the valve deck. According to the technical scheme, the high-pressure and high-pressure bidirectional metal sealed floating ball valve has the technical advantage of being suitable for meeting the use requirements for high-temperature and high-pressure bidirectional sealing.