Carbon dioxide aluminum cylinder valve

The utility model discloses a carbon dioxide aluminum cylinder valve which comprises a valve body, the valve body is provided with a vertically-through channel, an ejector rod extends into the upper end of the channel, the channel comprises an upper cavity and a lower cavity, a piston is installed at the upper end of the lower cavity, a spring is sleeved outside the piston, the ejector rod is located in the upper cavity, and a nut, a pressing cap and a base are further installed in the upper cavity. The left side and the right side of the upper end of the valve body are each provided with an air outlet, the air outlets, the pressing cap and the upper cavity are sequentially communicated from outside to inside, the base is provided with a vertically-through through hole, and a gap for air to pass through is reserved between the outer wall of the lower end of the ejector rod and the inner wall of the base. The upper end of the piston makes contact with the lower end of the base and blocks an opening in the lowe