In this paper

the reutilization of discarded biomass has been reviewed from the point of discarded natural polymer. Firstly

the type of natural polymer in discarded biomass has been summarized. These discarded natural polymers have many outstanding characteristics

such as bio-renewable

abundant functional groups

biodegradable

biocompatible

non-toxic biomass. Secondly

we summarize conventional treatment methods of disused biomass

which can be used as potential materials for different applications by reuse of channels. Thirdly

the progress of reusing waste natural polymer has been reviewed

such as composite materials

adsorption materials

carrier materials

energy materials

medical polymer materials and intelligent polymer materials. In conclusion

the prospect of discarded biomass and natural polymer materials has been summarized.