One of the goals of knowledge of construction management is to identify the unforeseen factors and situations in the way of implementing projects in order to provide effective plans for dealing with potential risks and project risks. Risk assessment is one of the most important factors in risk management and research indicates the need to use risk assessment to achieve success in construction projects. The aim of this study is to identify the types of risks in constructions projects based on the PMBOK, analysis, ranking and priority of risks using ANP method in order to improve the technical, qualitative and economic aspects of constructions projects. this research is in search of a suitable model that can use risk management and its methods in order to implement the economic and technical implementation of civil engineering projects. At first, 40 risks were identified in the context of 8 groups of risk factors through library studies and interviews, then by questionnaire and their analysis, were finally identified and ranked as the most important risks in constructions projects. Also, experts’ and experienced managers’ expertise in constructions activities was duly consulted to identify and prioritize the risks, and for the analysis of information, ANP and Super Decision software were used. Finally, it was found that the risk of delay in case of situations, adjustments and other costs to the contractor from the risk group of employers is the most important risk.