The booming development of the new energy vehicle industry has put forward higher requirements for the performance of electronic systems. Multilayer circuit boards play an important role in new energy vehicles due to their high-density wiring and excellent electrical performance. It is widely used in battery management systems, power control systems, and autonomous driving assistance systems, capable of accurately monitoring battery status, efficiently transmitting power signals, and quickly responding to autonomous driving commands. With the continuous advancement of multi-layer circuit board technology, it will continue to empower the improvement of the range, safety, and intelligence level of new energy vehicles.