CFPLH series pneumatic pinch valve is a lever extrusion, cylinder driven, position controlled, self-locking pinch valve. It is characterized by adding a self-locking device on the basis of the classic CF series pinch valve to automatically keep the pinch valve in the normally closed state. The valve is opened by overcoming the self-locking force with the thrust of the cylinder, and automatically returns to the closed state when the air source is withdrawn; At the same time, a cylinder positioner device is also added to control the air path of the positioner through electrical signals, so as to control the piston position of the cylinder and realize the manual control of the opening size of the inner sleeve of the pinch valve. It is suitable for applications that need to close the pinch valve immediately after the failure of the air source, power supply, etc. and also need to control the opening of the valve.