A multistage vortex flow spraying scrubber was designed to enhance the gas-liquid transfer for CO₂ capture.The CO₂ capture efficiency and mass transfer coefficient of typical alcohol amines(MEA and DEA) were experimentally investigated and the effect of operating conditions on efficiency was analyzed.The results show that the efficiency of CO₂ capture by MEA(maximum value 95%) is higher than that by DEA(maximum value 92.3%) under the same experimental conditions.The comparison of the results with literature data demonstrates that the multistage vortex flow spraying scrubber enhances the mass transfer process of amines-CO₂ reaction system.The CO₂ removal efficiency increases with the increase of the mass fraction of amines, liquid flow rates and reaction temperature.The lower CO₂ inlet volume fraction and gas flow rate are beneficial to promote CO₂ removal efficiency.