According to Putnam, social capital is the characteristics of social organization, such as trust, norms, and networks, that can improve the efficiency of society by facilitating cooperative actions. Social capital includes the volume and quality of relationships between people and facilitates cooperation between individuals. The more social capital there is in a society or organization, the greater the cooperation and coordination between individuals and groups, the better the flow of information. It also increases the general efficiency in creating the ability to cooperate, communicate, be creative, be patient, be responsible, and so on. The purpose of this research is to achieve the level of impact of agricultural protection policies on social capital (with an emphasis on social trust). The research method is case-based research and its type is applied-developmental. The statistical population of this research includes all owners and professors in the field of agricultural protection and the field of social sciences and policy-making, whose number is approximately 100 people.The sample size was considered due to the limitation of the total statistical population. The results of the study indicate that the successful implementation of defense policies depends on the level of social trust, which is low in this study area. For the purpose of the study, suggestions have been made to increase trust.