Floating ball valve with elastic double-seal valve seat

The utility model discloses a floating ball valve with an elastic double-seal valve seat, which solves the problem that the valve seat of the floating ball valve is easy to fail. The floating ball valve comprises a valve seat, a valve body and a floating ball body, the valve seat is arranged in the valve body, the valve seat comprises a first annular face, a second annular face and an arched face,and the first annular face and the second annular face are located in the radial direction and the axial direction of the valve seat respectively. When the edges of the first ring surface and the second ring surface are respectively in contact with the ball body, a first sealing pair and a second sealing pair which are in linear sealing fit are formed, and a recess is formed in the valve seat between the first sealing pair and the second sealing pair; the recess is located in the position close to the inner side of the ball body, the arched face is located in the opposite outer side directionof the recess and close t