Abstract: With the enhancement of environmental awareness of environmental and the intensification of the energy crisis, new energy vehicles, as a kind of green and sustainable transport, have received extensive attention. In order to further improve the energy efficiency of new energy vehicles, intelligent energy saving control system have become a hot spot of research. This paper firstly introduces the application status and development trend of embedded systems in new energy vehicles. Then, the design principles and methods of the intelligent energy-saving control system are introduced in detail, including the intelligent control strategies in energy management, power distribution, driving behaviour recognition and environment perception. Finally, the performance and effect of the system are verified through practical cases and test results, and the future development direction and application prospect are prospected. The research results have certain theoretical and practical application value for the energy saving control and energy management of new energy vehicles, and can provide a reference for the intelligent development of new energy vehicles.