Abstract: Aiming at the problems of excessive H₂S content in wet purified gas and total sulfur content in liquefied gas and low C₃⁺ yield in an associated gas treatment unit in Tahe oilfield, the integrated process of H₂S and organic sulfur removal from associated gas was innovated and applied based on sour gas atmospheric absorption experiment, which uses UDS compound amine solution to remove H₂S and organic sulfur simultaneously in same unit. In addition, the effect of natural gas treatment was improved by adding propane cooler and high-efficiency cyclone separator for feed gas and optimizing the parameter control logic of MDEA regeneration system. After revamping, the H₂S mass concentration in wet purified gas was reduced from 42-197 mg/m³ to 16-23 mg/m³, the total sulfur mass concentration in LPG was reduced by 90%, the yield of C₃⁺ increased to more than 95%, the daily average output of LPG and stable light hydrocarbon increased by 14.3 t and 4.6 t respectively, and the annual direct economic benefit was up to 20 million yuan.