The work aims to review the nanomaterial and the food fresh-keeping film prepared by nanomaterial as well as the research and application status of nanomaterial in food fresh-keeping. The nanomaterials commonly used in fresh-keeping films were introduced, including zinc oxide nanoparticles, titanium dioxide nanoparticles, silica nanoparticles, mesoporous silica nanoparticles and silver nanoparticles and the preparation methods of nano fresh-keeping films were expounded. Adding nanoparticles to traditional films or fresh-keeping films could effectively improve some film properties, such as mechanical property, barrier property and antibacterial property and extend the food shelf life and the storage period. Compared with the traditional film, the nano film has excellent properties in food packaging and fresh-keeping, and has great application potential. However, how to improve the application limitations of nano film such as photocatalysis needs further research.