Abstract: In order to solve the data storage problem caused by the access of the substation supervisory control and data acquisition (SCADA) system to the data storage problem, a substation data compression and storage method based on the improved revolving door algorithm is proposed. Firstly, the lossy compression algorithm of the revolving gate is introduced, and in view of the shortcomings of fixed storage frequency, fixed threshold value and ignored abnormal points, the adaptive frequency conversion data storage strategy, the dynamic adjustment threshold value strategy and the abnormal point recording strategy are proposed to improve the accuracy of the algorithm. Secondly, the variable position storage method is adopted for the remote message, remote control and remote adjustment data of the SCADA system of the substation, and the improved revolving door algorithm is adopted for the telemetry data. Finally, the effectiveness of the proposed method was verified through numerical examples.