Adolescent depression is mainly caused by social， genetic and other factors， manifested as a clinical syndrome of negative emotions such as self-denial and pain in adolescents， while non-suicidal self-injury （NSSI） behavior is a common accompanying symptom. NSSI refers to a type of behavior in which an individual intentionally and repeatedly harms their body without a clear suicidal intention. This kind of selfinjury behavior is not out of suicidal intention， but a way to deal with inner pain and negative emotions. NSSI behavior is common in adolescents， which has a serious impact on their physical and mental health. Clinical studies have shown that adolescents depression patients with NSSI behavior often exhibit neurological imaging differences， which may be related to changes in brain structure and function. Based on this， this paper analyzes and summarizes the research progress of behavioral magnetic resonance imaging （MRI） technology of NSSI in recent years， to provide reference for the pathogenesis research of NSSI behavior and clinical research.