Abstract: Reduction absorption process for tail gas desulfuration is an efficient method for the reduction of SO₂ emission, which is widely applied to tail gas treatment of sulfur recovery unit. Because of the low pressure and high ratio of CO₂ to H₂S, higher desulfurization efficiency and selectivity are needed in absorption process. On the basis of benefits of high gravity technology, such as larger mass transfer efficiency and shorter contact time of gas-liquid and so on, the technology was applied in hydrogenation tail gas desulfuration process. The rotational speed, gas-liquid ratios, lean solution temperature, and gas flow were investigated. The results showed that the high gravity technology had obvious advantages in hydrogenation reduction tail gas desulfuration process of sulfur recovery unit.