Abstract: A method for rapid determination of amount of uranium in PUREX process streams is developed. Sulfosalicylic acid is used as developer, 0.5 mol/L triethanolamine-0.1 mol/L sulfosalicylic acid is used as buffer agent in the method. For determination of uranium in aqueous phase and organic phase, the work establishes different procedure of operation. For determination of uranium in aqueous phase, the precision is better than 1.2%, the analysis needs 3 min. For determination of uranium in organic phase, the precision is 4.6%, the analysis is completed within 5 min.