Paper or recycled paper containing contaminants can be used for food packaging if the food is protected by a functional barrier made of plastic.It is important to research the migration of chemical compounds from these materials.The problem of contaminants transfering through the packaging into food was studied from a theoretical viewpoint.According to the actual system of paper/plastic packaging-compound-food，diffusion equations were built based on one-dimensional Fick diffusion theory.Different diffusion coefficients DP and DC of contaminant in paper and plastic，limited paper thickness，and partition coefficient kCP between paper and plastic were considered in the model.Analytical solutions were obtained under specific initial conditions and boundary conditions.In addition，the model universality used for the same bilayer plastic-compound-food system after simplification of the model was discussed.Then analysis was made between the model built and the Laoubi-Vergnaud model.The results showed that the model built can be used not only for the compound migration prediction from paper/plastic material，but also for the compound migration prediction from bilayer plastic material.