Adsorption tower gas distribution structure and PSA (Pressure Swing Adsorption) oxygen production adsorption tower

The utility model relates to the technical field of oxygen production equipment, in particular to an adsorption tower gas distribution structure and a PSA (Pressure Swing Adsorption) oxygen production adsorption tower. The gas distribution structure of the adsorption tower comprises a cyclone diffuser and a lower uniform distributor which are sequentially arranged in the gas flow direction, wherein the cyclone diffuser is used for converting the gas flow direction from direct flow forward to rotational flow forward; the lower uniform distributor comprises a plurality of frustum distributors, the large ends of the frustum distributors are opened and face the cyclone diffuser, a plurality of first vent holes are formed in the conical surfaces of the frustum distributors, and the frustum distributors enable air flow advancing in a rotational flow mode to enter the adsorption tower at a preset angle. The air distribution structure solves the problem that the service life of the molecular sieve is shortened due to