Full-automatic pneumatic lifting column

The utility model belongs to the technical field of supporting equipment, and particularly relates to a full-automatic pneumatic lifting column which comprises an outer sleeve, an inner sleeve is connected into the outer sleeve in a sliding mode, a piston is fixedly installed at the bottom of the inner sleeve, and a fixing frame is fixedly installed in the center of the top of the outer sleeve. The fixing frame is of a hollow structure, a fixing base is fixedly installed in the fixing frame, an electric push rod is fixedly installed on the side, away from the fixing frame, of the fixing base,and the electric push rod is electrically connected with an external power source. The locking assembly is fixedly installed in the center of the top of the outer sleeve, when the inner sleeve stretches out of the outer sleeve and stretches out to any position, the locking assembly can automatically lock the inner sleeve and the outer sleeve, the inner sleeve and the outer sleeve are effectively prevented from shaking, an