Abstract: Sericin is reclaimed by different methods such as freezing-centrifugation, acidification, organic solvent precipitation and chymic flocculation from cocoon-cooking water, then the sericin powders are prepared by roasting, several physical properties of sericin powder are preliminary investigated. The results show that the method of freezing-centrifugation is more effective than that of other methods, the recovery rate is high, sericin powder prepared by ethanol precipitation possesses excellent physical property, its solubility and absorbability to water and oil are higher than that of other methods, it exhibits preferable functional property.