In order to solve the problem of redundancy in monitoring the operation data of the generator motor of the pumped storage power station, which results in a long delay in storing the data, a blockchain-based storage method for monitoring the operation data of the generator motor of the pumped storage power station is proposed, and the security of the stored data is maintained through the authentication of the stored data. A data lay acquires operation monitor data of a generator motor of a pumped storage power station by using a data acquisition platform, eliminate that redundancy of the acquired data by using a change data capture (CDC) algorithm, and transmits the redundancy-eliminated data to a distributed storage layer through a sending terminal; The distributed storage database uses HBase technology to store the data that has passed the authentication in a multi-dimensional sorting and mapping way; the application layer client displays the storage results and provides data sharing services. The experimental results show that the data redundancy elimination effect of this method is good, the storage of motor operation monitoring data can be realized, and the storage data delay time is short, the identity registration cost is relatively stable when uploading data, and the storage data security can be guaranteed.