Carboxymethylchitosan is a kind of nature biomaterial with multi functional groups. It is widely used in food

cosmetic

enviroment protection

printing and dyeing

and agriculture. Becourse of its good performances and low cost it has great potential uses in biomedicine. In this paper we summarized the water solubility

membrane fomation

antimicrobial ability

degradability and biology properties of carboxymethylchitosan and the applications in biomedicine of carboxymethylchitosan including wound dressing

reduction of postoperative adhesions

drug delivery carrier were reviewd generally.