The invention provides a history storage method for a nuclear power station. A historical library is mainly divided into recording point data, management data and industrial process data, wherein the recording point data are used for recording configuration metadata of a historical library point, including a recording period, storage point items and types of the point items; the management data are used for recording history library point real time data archive file information, recording a data storage method and managing a data auxiliary data retrieval operation; and the industrial process data are real time data archive files of the history library point, and the history library point stores point real time data according to each point acquisition cycle.