Unauthorized border crossings can affect national security, economics, culture and social status, and the vastness of the country's south-east boundaries, along with the geographical, climatic, infrastructure and cultural status of those areas, make it even more challenging. The purpose of this study is to determine the type of applied purpose, the extent, the depth, and the time, a cross-sectional study. Research Method In this study, Delphi Classic uses interviewing techniques and prioritizing barriers through a checklist derived from interviews and sources. The statistical population of the study includes commanders of company and border checkpoints in south east of the country. Purposeful sampling and sample size in this study were 16 people who were interviewed and questionnaires in four stages. Findings showed that of the 50 barriers identified, the most barriers to dealing with unauthorized border traffic were social and environmental factors, cultural factors, and structural and physical factors. Socio-environmental factors include high levels of border vacancy, unemployment and lack of employment and high volume of incoming nationals; Trafficking in human beings is among the border guards; structural and physical factors include: lack of detention, facilitation of returnees, lack of detention, and lack of legal and judicial protection of border guards. In prioritizing these factors, respectively, socio-environmental factors, structural and physical factors, and cultural factors are involved in counteracting unauthorized border traffic.