Abstract: The factors such as wind speed, spraying flow, absorption solution concentration and H₂S concentration in coal mine which influenced H₂S absorption efficiency were studied through the experiment simulation device in this paper. The experimental results show that H₂S absorption efficiency declines with the increase of wind speed and H₂S concentration, increases with the raise of spraying flow and absorption solution concentration. Orthogonal experiments indicates that influence ability of these factors on H₂S absorption efficiency are different, and the order is wind speed, absorbing solution concentration, H₂S concentration and spraying flow. The research provides some experimental foundation for the development of H₂S management and process in coal mine.