Abstract: To solve the problems of the high regenerationenergy consumption and the thermal degradation caused by prolonged high-temperature heating of absorber in CO₂ chemical absorption system, a new type of tubular falling film reboiler was proposed. By analyzing the flow characteristics of falling film, a research was conducted on structural optimization design of liquid distributors. To verify the heat and mass transfer performance of the falling film reboiler and find the optimal operating parameters, a systematic thermal experiment was conducted on a 200 m³/h flue gas CO₂ chemical absorption pilot platform. The experiment results of falling film flow reveal that the unevenness of the liquid distributor can be significantly reduced to 0.026 after optimizing the direct opening of the connecting tube and the aperture of the distribution slot. Results show that, with the increase of liquid phase flow velocity within the tubes and the transition between laminar and turbulent flow states, the overall heat transfer coefficient of the falling film reboiler initially decreases and then increases. Concurrently, as the mass flow rate of steam increasing from 60 kg/h to 70 kg/h and 80 kg/h, the regeneration rate can be increased from approximately 10% to approximately 20%, and with a peak of up to 24.7%, thereby promoting the secondary desorption of the amine solution. By increasing the steam flow rate and the inlet temperature of the amine solution, the heat flux of the falling film reboiler gradually increases, resulting in a gradual enhancement of the overall heat transfer performance and a subsequent increase in the overall heat transfer coefficient. The CO₂ chemical absorption tube-type falling film reboiler developed in this study has achieved a reduction in the residence time of the absorbent within the reboiler, while simultaneously can improve the heat transfer efficiency of the reboiler and the CO₂ regeneration rate of the amine solution. This is expected to significantly reduce the heat consumption for carbon capture.