Due to excellent mechanical and optical properties,cellulose nanofiber,which was deliberated from wood,bamboo and agricultural residuals,attracted increasing attention in the past decades.The key stage is to better understand how to prepare cellulose nanofiber easily and to create commercial products with high added-value.Numerous efforts have been dedicated to push forward the cellulose nanofiber and its nanocomposites into commercialization.This presentation will give a brief summarization of research development of cellulose nanofiber an...