Pneumatic capping machine is specially for food packaging, beverage, aluminium alloy packaging can machinery. The whole machine consists of body, table, clamping device, pneumatic control system. A multi-purpose machine to solve the sealing and capping problems. The material of this machine is 304 in line with the medical grade, the height of the capping plate is adjustable, can be used for different sizes of barrels or bottles capping. It can improve the production efficiency of manufacturers, stable performance, ensure no leakage of liquid at the bottle mouth after capping, unlimited bottle type, can be customised, energy saving and environmental protection.