Natural deep eutectic solvents(NADES),a new type of green solvents,showed promising prospect in natural polysaccharide processing due to their remarkable properties,such as biodegradability,non-toxicity,recyclability,good solubility,low price,simple preparation and designability.In this paper,we reviewed the compositions and physico-chemical properties of various NADES,as well as their application in the processing of natural polysaccharides(e.g.,cellulose,starch and chitin).In the end,we presented the current challenges and opportunities for the application of NADES in polysaccharide processi...