Abstract: The scattering amplitude function of a randomly oriented finite length cylinder is derived.The Mueller ma- trix approach of Vector Radiative Transfer(VRT)equation for a layer of random scatterers above a rough surface is devel- oped.We takes account of five scattering mechanisms for both volume and surface scattering.It is applied to a vegetation canopy model,where vertical cylinders are modeled for trunks,randomly oriented cylinders are modeled for branches,nee- dle-like or disk-like particles are modeled for broad or needle leaves.Fully polarimetric scattering from hybrid non-spherical particles by using the Mueller matrix solution are numerically calculated.And numerical results agree well with experimental data.