Application of carboxymethyl chitosan quaternary ammonium salt as moisture absorption humectant

The invention relates to the cosmetic field, in particular to an application of carboxymethyl chitosan quaternary ammonium salt which is used as desiccating humectant. The carboxymethyl chitosan quaternary ammonium salt is N,N,N, trimethyl carboxymethyl chitosan quaternary ammonium salt, N- ethyl group-N, N-dimethyl carboxymethyl chitosan quaternary ammonium salt, N-propyl group-N, N-dimethyl carboxymethyl chitosan quaternary ammonium salt, N-butyl-N, N-dimethyl carboxymethyl chitosan quaternary ammonium salt, N- isobutyl group-N, N- dimethyl carboxymethyl chitosan quaternary ammonium salt, N-phenyl group-N, N-dimethyl carboxymethyl chitosan quaternary ammonium salt or N-salicylal group-N, and N-dimethyl carboxymethyl chitosan quaternary ammonium salt. The desiccating humectant of the invention has two activating groups which are quaternary ammonium salt base and carboxymethyl, the property hygroscopic and wet keeping is far higher than chitose, meanwhile the invention is better than hyaluronic acid, and the price of chitose is low, current price on market is far lower than hyaluronic acid. The invention is a desiccating humectant which has low cost and excellent property.