Abstract: The effects of some factors such as concentration of nitric acid, the molar ratio of hydroxy-lamine nitrate to plutonium and temperature on the stripping of plutonium are investigated. Cas-cade experiment with simulated 3AF and 3BF feed are carried out at room temperature and elevat-ed temperature(45--50℃) respectively. Plutonium recovery and DF for removal of uranium fromplutonium stream are given. Standing time of the organic phase loaded with plutonium influencesre-extraction of plutonium significantly.