On the basis of analyzing the characteristic of two-scale model and direct emissivity model

a new model named high-order Stokes vector model is presented.The four Stokes components of brightness temperature and emissivity are solved using the high-order small perturbation method（HSPM）.The modified effect by the complex index of refraction

wind speed and foam is quantitatively analyzed.Compared with a set of measured data

numerical computations of the brightness temperature by moment method and HSPM for actual rough sea surface are given.The results show that the new method is validity.