In recent years

natural polymer hydrogels have developed rapidly and have fully demonstrated their potential applications as drug delivery systems. Polysaccharide is a kind of multifunctional macromolecules

which is involved in many biological interactions that are vital to life. Due to their advantages like biocompatibility

biodegradability

wide source and low material cost

polysaccharides have good application prospect in drug delivery

wound healing and some other fields

and they are ideal materials for the preparation of drug loaded hydrogels. In this paper

the application progress of cellulose

chitosan

hyaluronic acid and sodium alginate as drug loaded hydrogel carriers was reviewed. The existing problems and future development directions in this field were also discussed.