PSA (Pressure Swing Adsorption) hydrogen production technology is a new type of gas adsorption and separation technology, which relies on two key properties of the adsorbent in physical adsorption: firstly, the adsorbent has different adsorption abilities for different gas components; Secondly, the adsorption capacity of the adsorbate on the adsorbent increases with the increase of the partial pressure of the adsorbate and decreases with the increase of the adsorption temperature. By utilizing these characteristics, adsorbents can adsorb hydrogen and other impurities under low temperature and high pressure conditions, and regenerate adsorbents under high temperature and low pressure conditions, thereby achieving the goal of continuous separation and purification of hydrogen