NOVELTY - Pressure swing adsorption (PSA) system highly purified hydrogen production method involves modifying raw material to obtain hydrogen rich modified gas, raising pressure, removing carbon monoxide (CO) by absorption with CO adsorption agent, regenerating CO adsorption agent, raising pressure, removing unnecessary gas with unnecessary gas adsorption agents, regenerating unnecessary gas adsorption agents, raising pressure, storing highly purified hydrogen in a buffer tank, leading the gas to hydrogen storage tank filled with hydrogen storage alloy, and discharging hydrogen by desorption.    USE - Pressure swing adsorption system (PSA) highly purified hydrogen production method for fuel cell.    ADVANTAGE - Product loss is reduced, and the process has high recovery rate.    DETAILED DESCRIPTION - PSA system highly purified hydrogen production method involves modifying raw material to obtain hydrogen rich modified gas, raising to a specified pressure, removing CO by absorption through 1st PSA adsorption tower filled with CO adsorption agent to obtain CO-less gas, regenerating CO adsorption agent, raising pressure in the 1st PSA adsorption tower to a specified pressure, removing unnecessary gas from CO-less gas in 2nd PSA adsorption tower filled with unnecessary gas adsorption agents, regenerating unnecessary gas adsorption agents, raising pressure in the 2nd PSA adsorption tower to specified pressure, carrying out temporary storage of highly purified hydrogen in a buffer tank provided at the back of 2nd PSA adsorption tower, leading the gas to hydrogen storage tank filled with hydrogen storage alloy in a predetermined temperature making hydrogen storage alloy occlude hydrogen in the gas under specified pressure, and discharging hydrogen by desorption under specified pressure.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the structure of PSA system highly purified hydrogen production apparatus. (Drawing includes non-English language text).    Modifier (1)    1st PSA apparatus (2)    1st PSA adsorption tower (2a-2c)    2nd PSA apparatus (3)    2nd PSA adsorption tower (3a-3c)    Buffer tank (4)    Hydrogen storage part (5)    Hydrogen storage tank (5a-5c)