The invention relates to an energy optimization method for a new energy vehicle, comprising the following steps: 1) During the running of the vehicle, the vehicle controller will collect the current vehicle speed V and acceleration a in real time, combined with the driver's current input: gear position, accelerator opening Speed, driving mode and brake switch to judge the current driver's operating intention: starting, accelerating, overtaking, braking, coasting or normal driving, etc.; The corresponding relationship between speed and vehicle speed, combined with the efficiency map of the motor and engine, reasonably allocates the power of the motor and the power of the engine to ensure the highest energy utilization. The invention can improve the energy utilization efficiency of the whole vehicle, effectively increase the mileage of pure electric driving, reduce the average fuel consumption of the whole vehicle; improve the driver's driving experience, and ensure timely response to the driver's needs under various working conditions; make the engine, The driving motor works in the high-efficiency zone, which improves the power performance of the vehicle under the same configuration.