In order to study the influences of swing, H2O and N2 on the removal of CO2 from offshore natural gas by adsorption and purification, dynamic penetration experiments of mixed multi?component gas in the dry and aqueous 13X zeolites under static and swing conditions were carried out. Mixtures of CH4/ CO2 and CH4/ CO2/ N2 were obtained by matching CH4, CO2, and N2 in proportion through a mass spectrometer. In addition, under static and swing conditions, the partial pressure of each gas in the mixtures at the exit of the dry and aqueous 13X zeolites at different time was measured during dynamic penetration experiments, and the penetration curve and penetration time were obtained. The adsorption and purification effect of CO2 in the two mixtures in the dry and aqueous 13X zeolites under the two conditions was analyzed according to the penetration time, and then the influences of swing, H2O and N2 on the removal of CO2 from offshore natural gas by adsorption and purification were clarified. The experimental results show that 13X zeolites have the strongest capacity in absorbing CO2 and the weakest capacity in absorbing N2 under static or swing conditions. N2 is conducive to the removal of CO2 from offshore natural gas by adsorption and purification, while the swing and H2O fail to do so.