In order to address the issues of gas desulfurization and CO2 removal control and waste gas treatment in offshore platforms, a process system of “membrane separation + acid gas reinjection” is proposed. Firstly, the application of membrane separation technology and acid gas reinjection technology in petrochemical industry is analyzed. The paper proposed that the membrane separation technology be used to desulphurize and remove CO2 from the gas produced on offshore platform, and then the acid gas reinjection technology be used to reinject the acid tail gas back into the formation for storage. Secondly, the “two-stage membrane separation+four-stage compression” process is designed and compared with LO-CAT process from the aspects of process equipment skid footprint, process system production energy consumption, process by-product treatment and so on. The results show that “two-stage membrane separation + fourstage compression” process equipment skid-size is smaller (11 m×8 m×7 m), and the system production energy consumption is lower (269.9 kW), with simultaneous desulfurization and CO2 removal and emits no by-prduct. It is concluded that with the diversified membrane material and the adjustable separation and compression stages, the “membrane separation + acid gas reinjection” technology system has good applicability to various oil and gas field development plans, and enjoys promising economic and environmental protection prospects on offshore platform application. It is recommended that this related research needs to be further promoted in China.