To maintaining competitive ability, Manufacturing companies are looking for new ways in order to profit taking from the productive capacities. Enterprise resource planning systems provide the features that organizations are capable of integrating of information flows and business processes in their organizations, Because in the near future most of our organizations will require to use this technology, this study examines the main obstacles to implementation and readiness to implement the technology in the Mazandaran wood and paper company .The conceptual model used in this study will be based on a Three Dimensional model of Social Science. After the accurate identification of barriers in the implementation of Enterprise Resource Planning projects from expert opinion, using survey and polling of experts and managers mentioned are identified and prioritized behavioral and structural , contextual barriers in implementation of ERP projects. After performing the relevant tests determined that "behavioral barriers" is the most and "group structural barriers" is the least important barrier for implement an ERP system in this research.