In view of the fact that the landing process of the re-entry capsule with airbags under wave conditions is not clear, based on the combination of a certain type of re-entry capsule with airbags, the corresponding multi-media coupling model is established by using the fluid-structure interaction algorithm, airbag simulation algorithm and wave simulation algorithm in related simulation calculation software. The water landing process of the re-entry capsule with airbags under two different wave conditions, sine regular wave and irregular wave, are numencally simulated, and the influence of different wave conditions under different working conditions on the peak overload, internal pressure and force of the return capsule is discussed. After analysis, it is concluded that the overload and the peak internal pressure corresponding to the irregular wave condition under the conditions of zero horizontal velocity and zero attitude angle are smaller than those under the influence of regular waves. Under the condition of horizontal velocity and attitude angle, the reverse acceleration process occurs when the horizontal velocity is large under the influence of regular waves, and the deformation and force distribution of the airbag system are also significantly different from those of irregular waves. The research results can provide a technical reference for the design and performance evaluation of offshore recovery systems.