The electromagnetic noises of traditional submersible induction motor and a new type of submersible permanent magnet assisted synchronous reluctance motor (PMASRM) with higher efficiency are analyzed and compared by using multi-physical-field-coupling finite element analysis. In the electromagnetic field finite element software, the results of air-gap flux density and radial electromagnetic force wave are decomposed by 2D Fourier transform, and the space-time characteristics of air-gap magnetic field and radial force wave are analyzed. The spatial order of air-gap flux density harmonics generated by the rotor PMASRM is higher, and the order of radial electromagnetic force wave is also higher, which can lower the level of electromagnetic noise. The acoustic simulation results verify the conclusion.