Aiming at noise problem in the operation of induction motor, through the multi physical field coupling finite element calculation of a 160 kW submersible induction motor, combined with the analytical method to explore the the order and frequency of the radial electromagnetic force, the space-time characteristics of radial electromagnetic force wave in the motor air gap are analyzed, and the correlation calculation of the noise is carried out through acoustic simulation. Considering the results of two-dimensional Fourier decomposition of radial electromagnetic force and the order and frequency of the mode of the shell model, the source of noise is analyzed and explained. The aim of noise control is proposed, such as changing the distribution of motor mode in order and frequency by adjusting the number of radiator ribs of the motor shell or reducing the vibration coefficient of motor shell.