The pneumatic ball valve only needs to be operated with a pneumatic actuator and rotated 90 degrees with an air source and a small torque to close tightly. The completely equal body cavity provides a straight-through flow path with minimal resistance to the medium. It is generally considered that ball valves are most suitable for direct opening and closing. The main feature of the ball valve is that it is compact in structure, easy to operate and maintain, and is suitable for general working media such as water, solvents, acids and natural gas, but also suitable for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene. The ball valve body can be monolithic or combined.