The policy of approximation of Islamic religions is one of the most important strategies for strengthening convergence, social cohesion, and sustainable security in Islamic societies. Despite numerous studies on the jurisprudential and theological foundations of approximation, the role of this policy in the management of political and social crises has been less systematically examined. The aim of this research is to explain the capacities of the policy of approximation of religions in the management of political and social crises and to present a strategic model in this field. The present research is applied in terms of purpose and qualitative in terms of method. The data were collected using library studies and analysis of reliable documents and analyzed using the content analysis method based on the Brown and Clark model. In the analysis process, 60 initial codes, 18 basic themes, 7 organizing themes, and 3 overarching themes were extracted and based on them, a conceptual model of the research was designed. The results showed that the policy of religious rapprochement creates an effective capacity for preventing and managing political and social crises by strengthening a common Islamic identity, developing interfaith dialogue, increasing social capital, promoting public trust, reducing extremism, strengthening inclusive governance, and developing unity diplomacy. It was also found that social capital, mutual trust, and elite participation play the role of mediating variables in this process. The research findings indicate that the policy of religious rapprochement, if institutionalized in the governance system, education, media, and public policymaking, can become one of the most important tools for promoting national security, reducing religious conflicts, increasing social cohesion, and sustainable crisis management in Islamic societies. The strategic model presented can be a basis for future policymaking and research in the field of religious rapprochement, security, and crisis management.