Abstract: 【Purpose/significance】As a production factor, the data information of electric power system contains a large amount of transformation value, which can realize the spillover effect by effectively satisfying the consumer surplus and social welfare improve⁃ment on the demand side, and promoting the efficient growth of electric power supply efficiency on the supply side.【Method/process】Through the empirical analysis, it can be seen that the spillover effect of electric power data information is reflected in its significant role in promoting high-quality economic development, and the insufficient development of power data information gradually weakens the development of factor marketization.【Result/conclusion】Local governments should take the optimal allocation of data and infor⁃mation resources as the goal, further reform the market-oriented system and mechanism of power data element allocation, correct the
power data information ownership definition and transaction mechanism, strengthen the security of power data information, enhance the synergy between power data information and other elements, make rational use of and actively develop its spillover effect.【Innova⁃tion/limitation】The spillover effect of electric power data information is reflected by the impact of electric power data elements on eco⁃nomic high-quality development, which is a useful attempt to measure the level of economic high-quality development.