This article focuses on the application and optimization of artificial intelligence technology in the electrical system of new energy vehicles. Research shows that artificial intelligence has achieved breakthroughs in intelligent improvement of drive control systems， optimization of energy management， fault diagnosis and predictive maintenance， and intelligent user interface interaction through algorithms such as deep learning and reinforcement learning. Among them，the torque accuracy of the drive system has been increased to 95%，the energy consumption of the energy management system has been reduced by 10%， and the predictive maintenance technology has enabled the fault detection accuracy rate to reach 95%. In the future， with the improvement of algorithm efficiency， artificial intelligence is expected to further promote the intelligent and environmentally friendly development of new energy vehicles，providing support for the sustainable development of the automotive industry.