The invention relates to a named data network caching method, a buffer and a storage medium. The named data network caching method comprises the following steps: judging the state of a node; accordingto the state of the node and a to-be-determined interest table, obtaining the preference degree of the node for a classification interest packet; obtaining the local popularity of the classificationdata packet according to the to-be-determined interest table; calculating and obtaining a caching probability according to the preference degree and the local popularity; comparing the caching probability with a caching probability threshold value, and determining whether to cache or not. The invention also discloses a named data network buffer and a storage medium. According to the invention, thespatio-temporal characteristic of the data packet is utilized by judging the state of the node; andwhen whether to cache the data packet is determined, the user preference and the local popularity ofthe data packet are comprehensively considered, more effective data contents in the network is cached, a better cache space utilization rate is obtained, the data redundancy is reduced, the data hitrate is improved, and the average hop count and the time delay are reduced.