Ball valve for fixing ball

The utility model provides a ball valve for a fixing ball. The ball valve for the fixing ball comprises a valve body, a spring, a pressing board, a valve seat, a sealing ring, an upper valve rod, a ball body and a lower valve rod. The upper end of the ball body is fixedly connected with the upper valve rod, and the lower end of the ball body is fixedly connected with the lower valve rod; the two sides of the ball body on the valve body are respectively provided with a valve body groove, and the valve seat is arranged in the valve body groove and can slide along the valve body groove; a groove is formed in the outer circle of the valve seat, and the sealing ring used for sealing the valve seat and the valve body is mounted in the groove; the pressing board is arranged on one end portion, away from the ball body, of the valve seat, and abuts against the sealing ring; the spring is arranged between the pressing board and the bottom end face of the valve body groove. Due to the fact that the spring is arranged at