[Purpose/significance] Based on the basic connotation of kinetic energy conversion, this paper preliminarily clarifies the internal logic of library information service innovation, quality improvement and efficiency enhancement under the new normal. According to the logic of temporal development of normal, abnormal state and new normal, this paper analyzes and summarizes the practice cases of new supply of library information service in the period of abnormal state (new normal superimposes COVID-19), and forms a new service mode that has a certain theoretical basis, can be copied, and can be applied to a variety of scenarios. It has a certain reference significance for the new normal of libraries and quality improvement and efficiency enhancement of service innovation in the future.[Method/process] With the combination of theoretical research and case study, this paper specifically analyzed the content, characteristics and relationship model of library users' new demand and new service supply in kinetic energy conversion; then, based on the full combination of new supply and new demand with typical cases, it analyzed the methods and effects of improving quality and efficiency of service innovation; finally, it gave countermeasures and suggestions on the basic framework of the high-quality development of library information service innovation under the new normal.[Result/conclusion] This paper systematically analyzes and summarizes the specific practice cases of library information service innovation under the abnormal state, is premised on discovering new users' needs, meets the new users' needs, provides new service supply as the solution path, and realizes that the improvement of quality and efficiency of library information service innovation is the important direction of high-quality development of library under the new normal in the process of kinetic energy conversion. The new practice of library information service innovation under the abnormal state will also become an important driving force of library information service innovation under the new normal.