Separation anxiety disorder in adults has received increased attention recently, while trauma has been regarded as the root of much psychopathology. Individuals could have different responses to trauma due to various factors, thus rendering the link between trauma and mental disorders complex. However, few research has been done on the relationship between adult separation anxiety disorder (ASAD) and trauma. This study delves into the intricate interplay between them, aiming to shed light on the potential antecedents and treatment of ASAD. Through a comprehensive review of existing literature, the study endeavors to illustrate the function of life trauma in the manifestation of ASAD with a focus on the underlying cognitive processes. Furthermore, the study examines the interplay between ASAD and violence at both societal and individual levels, unveiling a possible cyclical that may perpetuate disorder and conflicts. Potential therapeutic implications of the finding are also discussed. To conclude, past traumatic experiences could contribute to the development of ASAD conditions through mediating pathways. However, most current studies are cross-sectional, thus no further causal relationship could be concluded. More longitudinal research and studies on potential treatment of trauma-involved ASAD are required in the future.