Abstract: PatSnap was used to collect domestic and foreign patent data of nanocellulose, and then patent publication trends, countries of patent assignees, main assignees, highly cited patents, technical areas and technological evolution paths were analyzed by patent analysis, patent maps and multiple main paths method. The results show that the technology of nanocellulose is in a fast developing stage and it is the hotspot of the world; USA, China, Japan, India and Finland are the leading countries; China has a large number of patents, but the impact needs to be improved, the assignees are mainly universities; the preparation of nanocellulose is key point and the application is wide.