Abstract: The asymmetric structure of a tropical cyclone (TC) is closely related to its development, so it has great practical significance to research the asymmetrical structure of the eyewall in improving the intensity forecast. During the TC translation, the asymmetric friction induces winds convergence and influences the distribution of convection within the eyewall. Vertical shear as one of the important factors that impact TC intensity blows the upper warmer core apart from its surface circulation. The shear first induces asymmetry of vertical movement, and then causes clouds and rainfall asymmetry in the azimuthal direction. The radial gradient of potential vorticity causes waves in the vortex inner core, which are similar to Rossby waves and affect the asymmetric structure. The ocean as the important energy source supplies plenty of sensible and latent heat. However, it is paid little attention about how the sea surface influences the asymmetry of the TC eyewall. We reviewed the studies of the air-sea interaction under TC conditions, in which the most evident characteristic of the ocean response is the cold wake effect. The sea surface temperature (SST) cooling reduces the sensible and latent heat transportation from the ocean to the atmosphere and impacts the asymmetry of the eyewall. In addition, the sea surface roughness influenced by waves has impacts on the asymmetry of the eyewall through the air-sea boundary layer.