For analyze the impact of the forward scattering angle to polarization imaging, starting from the contrast ratio of the polarization image, the target is irradiated by horizontal polarization and - 45° linear polarization respectively with 532 nm wavelength in different polarization states of the linearly polarized light, the polarization image contrast of them are calculated. The results show that the polarization image contrast is raised by the increasing of forward scattering angle and the horizontal linear polarization image contrast is lower than that of -45° linear polarization. The experimental results can provide technical support for the subsequent work on polarization imaging detection.