In　this　letter　a　Monte　Carlo　(MC)　algorithm　is　used　to　simulate　the　propagation　of　polarized　light　in　double-layer　turbid　media　and　the　2-dimentional　backscattered　Stokes　vectors　and　Mueller　matrices　are　obtained.　Relationships　between　backscattered　Mueller　matrix　and　optical　properties,　such　as　scattering,　absorption　and　layered　structure,　are　discussed　in　detail.　Integrating　the　2-dimentional　Mueller　matrix　elements　along　radial　and　azimuthal　directions,　we　obtain　a　reverse　trend　with　respect　to　the　optical　parameters　for　upper　and　lower　layers,　which　suggests　possibilities　for　discriminating　subtle　optical　properties　in　a　double-layer　structure　using　backscattered　polarization　patterns　such　as　Mueller　matrix.　©　2011　Tianjin　University　of　Technology　and　Springer-Verlag　Berlin　Heidelberg.