The relationship between research and policy-making is one of great interest in the public policy field, especially since a large number of actors seek to influence the government (lobbyists, academic researchers, NGOs). These partnerships are not without difficulties, caused mainly by the many differences that remain between the worlds of researchers and policymakers. So, in addition, to express the incompatibility aspects among the researchers and policy-makers, the barriers of interaction between the research and policy have been identified by the documentary study. The results show these barriers can be summarized in four categories as Ineffective communication among policymakers and researchers, non-applicability of research in policy making, Lack of capacity to conduct policy research and Problems in the dissemination of research findings. Finally, recommendations for resolving these problems are presented that are useful for policy-makers and researchers.