As a new type of nanofiber material,nanocellulose is widely used in various industries.This article first elaborates on the definition and characteristics of nanocellulose,followed by the preparation methods of nanocellulose,including high-pressure cellulose method,oxidation method,and acid hydrolysis method.Finally,the specific application area are summarized,including applications in the sizing slurry,printing ink,biosensing textile material,finishing agent,and fabric composite film.The application of nanocellulose can not only improve the mechanical properties of textile materials,but also endow them with other functions,thereby improving the quality of materials and accelerating the development of new textile products.