Abstract: The CO2 capture test was conducted in a flue gas device with 2 m3 / h capacity by chemical absorption. The results show that the suitable process conditions are: absorbent 15%~30%, absorption temperature 60-70℃, desorption temperature 90-120℃, gas-liquid ratio 70-250 and total reflux mode of absorbing liquid. The capture rate of CO2 is 95%, and desorption rate reaches 80% using a new developed absorbent CHA. The absorption rate of the CHA is equivalent to that of ethanolamine (MEA) and the energy consumption and the corrosion to equipment are less than MEA. The rate of corrosion of CHA is only 0.0136mm/a, while the rate of MEA is 0.0325mm/a. The SO2 in flue gas has an import influence on CO2 capture and should be removed in advance.