Abstract: Aiming at the problem that it is difficult to quickly query and share large quantities of data in power system, this paper analyzes the data characteristics collected in power industry, designs a storage structure scheme of batch data combined with computer data representation and storage mode, including the storage structure of key data, difference data and special data, and puts forward a data compression and recovery algorithm based on previous value difference storage, The time complexity and space complexity of the algorithm are analyzed. The algorithm can deploy applications without changing the existing database deployment and network architecture. At the same time, it has the characteristics of fast compression and recovery speed, supporting data compression and recovery with transmission, and direct splicing of any compressed data. This paper uses the collected real data to simulate and test in LabVIEW and MySQL software, which has achieved the expected results and has a very broad promotion prospect.