The invention belongs to the field of wireless communications, relates to a communication technology between devices of a mobile cellular network, and specifically relates to a content caching methodbased on local popularity. The method comprises the following steps: making a statistics of files requested by an interest packet passing through mobile equipment in a time window; calculating the local popularity of the files based on the above statistics; calculating the optimal number of files based on the local popularity of the files; and modifying a file library according to the optimal number of files. According to the content caching method based on the local popularity provided by the invention, a caching strategy of a cache stage is given, that is, the number of files in the file library is reduced when the cache space of mobile equipment is limited, the cache hit rate is improved as much as possible, and the average energy consumption of a system is reduced.