Abstract: Focusing on the backscattering enhancement effect of Gaussian,fractal and bandlimited ocean spectrum rough sea surface,the moment of method associated with the tapering incident wave is adopted.The matching problem for the tapering parameter and the rough surface size under different incident angles with Gaussian and fractal model is studied.The angular width of backscattering enhancement for the three models is compared.The angular width and the amplitudes of enhancement under diverse wind speed,roughness and fractal dimensional numbers are analyzed with this method.