Objective: In critical situations, emotional security is one of the most essential components of relational resilience. Therefore,The present study aims to develop a model of Reconstruction of emotional security among Iranian couples in the War Crisis. Method: This study employed a qualitative approach using the Grounded Theory methodology. Data were collected through semi-structured interviews with 16 purposively and criterion-selected couples, continuing until theoretical saturation was achieved. Data analysis was conducted using Strauss and Corbin's (1998) open, axial, and selective coding procedures. Findings: Data analysis led to the emergence of the core category: “Reconstruction of emotional security”. The results indicated that “Reconstructing the meaning of relationships in crisis” and “Activation of secure couple attachment” serve as the causal conditions for Reconstruction of emotional security. “Emotion regulation and mutual support” and “Reorganization of couple performance” act as strategies for recreating emotional security in a relationship. Furthermore, “Pre-crisis communication capital” and “Resilience experiences and resources” were identified as the intervening conditions. “Environmental and situational pressures” functioned as intervening variables in the emergence and persistence of Current model. Finally, “Deepening a secure emotional bond between couples” emerged as the consequence of implementing sector security strategies among Iranian couples under wartime conditions. Conclusion: The findings of this study, in addition to providing essential insights for couples and mental health practitioners working with individuals in wartime crises, can assist educational and clinical centers in designing psychoeducational packages and programs aimed at enhancing Emotional security of couples.