Abstract: As a secondary energy carrier complementary to electricity,hydrogen energy is expected to play a critical role in the future low-carbon energy system.To explore the hydrogen economy in the context of the new power system,the electrolytic hydrogen technology that is a key link in the coupling between electricity and other energy fields is focused on,and the technical and economic analysis and application prospects are made.First,the research status of electrolytic hydrogen technology at home and abroad are reviewed from two perspectives of technology development level and application in energy systems.Then,the economic model of electrolytic hydrogen is established,and the technical and economic analysis of electrolytic hydrogen under the background of new power systems is carried out based on the technical characteristics of new power systems.Finally,the application prospect of electrolytic hydrogen technology is analyzed from three aspects of local hydrogen development policy,terminal hydrogen demand potential,and support for new power systems.