In order to reveal the specific parameters and achieve the effective measurement of the wet steam parameters in steam turbines,a new receiving-angle of CCD camera is put forward for the measurement model of wet steam parameters based on the backscatter method and CCD camera imaging.The influence of different scattering angles on the scattering ratio is analyzed.The results show that the optimal scattering ratio and the maximum SNR can be obtained when the receiving-angle of scattered light is backward 7°,which means a most suitable receiving-angle.By analyzing and verifying the change law of the scattered light intensity at the backward angle of 7° along with different scale distribution parameters K,mass intermediate radius r-0.5 of water droplets group and number density N of water droplets,the trend of the scattered light intensity at the backward angle of 7° is consistent with the theoretical change trend,which may provide a basis for study on wet steam parameters measured by backscatter method.