Abstract:As the most widely used polymer in nature，cellulose was of great significance for ecological sustainable development and resource utilization.The nanocellulose could be obtained from natural cellulose by fine processing，showing the characteristics of high aspect ratio，high specific surface area，high crystallinity，light weight，good mechanical strength，degradability，reproducibility and biocompatibility.It was a new type of nanomaterial with broad application prospects.This review firstly summarized the classification of nanocellulose and its main preparation methods，and then briefly introduced the application of natural，modified and functionally doped nanocellulose in Pickering emulsions，including engineering，biomedicine and material engineering.This review aimed to provide research ideas for the preparation of nanocellulose and its application in Pickering emulsions.