Abstract:This paper reviewed the research progress of cellulose nanopaper with controllable porous structures and its applications. Firstly, the pore structure and its characterization methods of cellulose nanopaper were introduced. Then the influences of preparation of nano-cellulose, suspension and cellulose nanopaper on the porous structure of the nanopaper were discussed in detail. Finally, the applications of porous cellulose nanopaper in conductive energy storage materials, separation and adsorption materials were described. Using only one porous adjustment method has some limitations to meet the application requirements and broaden the application, combining various methods to prepare cellulose nanopapers with specific porous structure and compositing other functional porous nanomembranes prepared with other materials is the future development direction.