The invention discloses a fixed ball valve which comprises a valve body, a ball body, a valve seat and a corrugated pipe spring, wherein a channel is arranged in the valve body and a first annular groove is formed in the channel. The ball body is disposed in the channel of the valve body, and the ball body rotates to enable the channel to be unobstructed or cut off. The valve seat is arranged on two sides of the ball body in the axial direction of the channel. A first annular groove which can contain the valve seat and the corrugated pipe spring is arranged in the channel of the valve body, and the corrugated pipe spring is arranged on the side, away from the ball body, of the valve seat and abuts against the side wall of the first annular groove. According to the fixed ball valve, the initial sealing force between the ball body and the valve seat is provided through the corrugated pipe spring, so that sealing is more reliable, and damage of solid particle media to internal parts of the ball valve is avoided.