Because manta rays have the advantages of low noise and good maneuverability during motion，this paper uses manta rays as a biomimetic object. By combining dynamic mesh technology and analyzing the hydrodynamic force of a section of bionic manta’s outline，this paper studies the influence of different frequencies and different wavelengths on characteristics of the section’s surrounding flow field under large deformation conditions. The simulation calculation results show that when the wavelength is constant，as the frequency increases， the fluctuation coefficient of the lift coefficient becomes larger and the thrust increases. When the frequency is constant，as the wavelength increases，the fluctuation coefficient of the lift coefficient becomes larger and the thrust increases.
