Ball valve sealing element and ball valve

The utility model discloses a ball valve sealing piece and a ball valve, and relates to the field of ball valves. An inner notch is formed in the installation ring, an annular groove is formed in the side wall of the inner notch, a fixing plate is installed in the inner notch in a sliding mode, an annular plate is fixedly connected to the circumferential side face of the fixing plate, a fixing sliding rod is fixedly connected into the annular groove, and an extrusion spring is connected to the circumferential side face of the fixing sliding rod in a sliding and sleeved mode. The surface of the second sealing gasket is an inner arc surface, the arc surface is in attached contact with the surface of the inner ball body, a mounting groove is formed in the surface, away from the second sealing gasket, of the mounting ring, the first sealing gasket is fixedly mounted in the mounting groove, the inner ball body comprises a circulation hole, the mounting ring comprises a middle hole, and the circulation hole communi