In this paper, an improved 2D fractal model is present for modeling the sea surface, the fractal spectrum of which satisfies the positive or negative power law for spatial wave numbers smaller or larger than the fundamental wave number, respectively. The spatial correlation function and the spectrum of this improved model show good agreements with those given in the literature for different windspeed. Based on the Kirchhoff approximation, the scattering coefficient and the scattering intensity coefficient of this new model are derived and evaluated. The angular distributions of backscattering intensity coefficient of the improved fractal sea model are compared with those of the conventional model, the influence of the incident frequency, windspeed and wind-direction on the backscattering intensity coefficient is also discus sed in detail.