Fluorine lined ball valve uses a ball with a circular through-hole as the opening and closing element. The ball rotates around the centerline of the valve body with the valve stem to achieve valve opening and closing. Adopting a special molding process to make the sealing surface dense and good, coupled with the V-shaped PTFE packing combination, the valve achieves zero leakage; The ball and valve stem are cast together, eliminating the possibility of the valve stem being pushed out of the pressure bearing part due to pressure changes, fundamentally ensuring safety during use; Adopting a fully plastic lining process, it is resistant to strong corrosion from media.