The invention relates to a CAE-based simulation optimization method of a motor for a power automobile. The method comprises the following steps: providing a virtual motor; carrying out static electromagnetic field analysis on the virtual motor, and calculating static electromagnetic parameters of the virtual motor according to a static electromagnetic field calculation model; performing transientelectromagnetic field analysis on the virtual motor, and calculating transient electromagnetic parameters of the virtual motor according to a transient electromagnetic field calculation model; judgingwhether the static electromagnetic parameters and the transient electromagnetic parameters of the virtual motor are in an electromagnetic parameter threshold range or not; if yes, vibration noise analysis is conducted on the virtual motor, vibration noise is calculated according to a vibration noise calculation model, whether the vibration noise is within the vibration noise threshold range or not is judged, and if yes, motor initial parameters are stored to serve as motor design parameters to design the motor. The method disclosed by the invention not only meets the conditions of common motors, but also meets the condition of low vibration noise, and adopts the modes of parameter linkage, scanning characteristics and the like, thereby greatly shortening the development period and savingmanpower and material resources.