Abstract: The adsorption and desorption of CO, H₂O(g), CO₂ and H₂ in the water gas shift reaction on the Cu/ZnO/Al₂O₃ catalyst were studied by TPD. And a similar discussion was made for six samples which bore analogy definite to Cu/ZnO/ A1₂O₃ catalyst. It was discovered through analyzing qualitativly to TPDspectra had been got that the adsorption and desorption action were different for the water gas shift reaction conponents on the compositions of Cu/ZnO/Al₂O₃.Different compositions had an adsorption and desorption characteristic in itself. All the results gave useful informations for an explanation of the mechanism of the low temperature water gas shift reaction.