A pneumatic actuator soft-seated plug valve is made up of a non-lubricated, sleeved-type, soft-seated plug valve combined with either a double-acting or single-acting pneumatic actuator. This valve is designed for rapid switching, thanks to the rotary sealing surface's wiping action, which ensures no contact with the flow media when fully open. It is also effective for use with suspended mediums. Additionally, the pneumatic actuator soft-seated plug valve is highly adaptable to a multi-channel structure, accommodating two, three, or even four different flow channels. This flexibility simplifies the piping system's design, reducing the need for multiple valves and connections, thereby enhancing the system's efficiency and complexity.