Double-wall blank pipe, double-wall container and pneumatic control non-return lifting cover

The invention discloses a double-wall blank pipe, a double-wall container and a pneumatic control non-return lifting cover. The double-wall container is formed by blow molding of the double-wall blank pipe. The double-layer bottle comprises a bottle opening part, an inner-layer bottle, an outer-layer bottle and an air pressure space between the bottle opening part and the outer-layer bottle. The air control non-return lifting cover is combined with the bottle opening part and comprises a valve and an air inlet. And a continuous air flow channel is formed between the air control non-return lifting cover and the double-wall container. When the outer-layer bottle is extruded, air pressure in the air pressure space promotes the valve to seal the air inlet and prevent air from being exhausted, so that the inner-layer bottle is promoted to be pressed by utilizing the air pressure, and the inner-layer bottle is subjected to volume reduction and deformation to release contents in the inner-layer bottle from the air-c