This paper focuses on the exploration of new preparation methods of solvent nanocellulose dry powder and nano carboxymethyl cellulose, and further introduces the research progress of Beijing Engineering Research Centre of Cellulose and Its Derivatives in the special application of nanocellulose in recent years, including the applications of nano cellulose in the fields of non-woven macrofiber mat-based supercapacitor, lithium-ion battery diaphragms, flexible wearable devices, solid propellants, flexible polarized fluorescent composites and 3D printing. This paper not only expounds the research progress of the Beijing Institute of Technology cellulose team in nanocellulose industrialization, but also explores the research progress of the Beijing Institute of Technology cellulose team in the quantitative production of low-cost, green, environmental protection nanocellulose.