Monte-Carlo Simulations for light propagation in striated scattering medium are presented. Considering the influence of refractive index mismatch and different beam profiles (such as uniform flat beam, Gauss beam and fiber beam), the light transport property in the skin striated structure is calculated, and the characteristic of optical flux in the proximity of the interfaces is analysed. The diffusive reflectivity curves of different beams are given and the convolution results of finite-wide flat and Gauss beams are compared.