Understanding the variation of optical properties of polarized light during motion transmission in turbid media is the basis for polarized imaging research on targets in turbid media. In this paper, the degree of polarization of the polarized light used in the experiment was measured first, and the error between the polarization of the polarized light and the ideal polarized light was calculated. Then the particle size and distribution of the fat emulsion particles were measured by the Malvern particle size analyzer. The scattering types of photon and fat emulsion particles were analyzed. Finally, the depolarization of forward scattered light and backscattered light produced by linearly polarized light and circularly polarized light after passing through different concentrations of turbid medium were studied. The results show that the polarization degree of forward scattered light generated in the same concentration of fat emulsion solution is higher than that of backscattered light, and the degree of polarization of both forward scattered light and the backscattered light decreases continuously with the increase of the concentration of fat emulsion solution, and finally stabilizes.