Carboxymethyl chitosan with good water solubility was synthesized in this paper.Carboxymethyl chitosan solution as flocculant was applied in purificantion of Chinses traditional medicine.

• 合成了具有良好水溶性的羧甲基壳聚糖,并将产品水溶液作为絮凝剂应用于中药制剂的提纯。