Abstract: The backscattering coefficients (BSC) of sea surface are calculated with the two-scale method (TSM). As the scattering coefficients from experiment data are not consistent with the theory at large incident angles, especially for horizontal (HH) polarization, the mesoscale breaking wave model is introduced to modify the scattering coefficients. The average backscattering coefficients can be obtained by statistical averaging the scattering coefficients from mesoscale breaking waves with different parameters. Accounting for the model of breaking wave coverage, the breaking wave model and the scattering coefficients from sea surface can be combined together, and the modified scattering coefficients model including the contribution of breaking wave is obtained. The results indicate this breaking wave model has a great revision for HH polarization, which makes the scattering coefficients more agreeable with the experimental data. For the vertical (VV) polarization, the result of TSM is well agree with experimental data, and the revision is little from the breaking wave.