Antisocial personality disorder, also known as unemotional personality disorder or sociopathy, is the type with the most serious impact on society. The prevalence rate is 4.3-9.4% in developed countries and 0.3% in Taiwan, China. Antisocial personality disorder is characterized by high levels of aggression, lack of shame, inability to learn from experiences, behavior driven by accidental motives, and social maladjustment, etc. However, these are all relative. The incidence of this disorder in relatives is positively correlated with blood relationship, i.e., the closer the blood relationship, the higher the incidence. It has been shown that patients have a higher rate of abnormal EEG in both parents; monozygotic twins have a higher rate of consistent personality, very similar EEG, and a higher crime rate than dizygotic twins. Foster children with pathological personality have a higher incidence of pathological personality compared to normal controls. 2, brain dysplasia EEG examination confirmed that patients with this type of personality have immature brain development and may have had brain damage. From the pathological psychological analysis, the patient’s psychological behavior has childish and very immature characteristics, which is the pathological change of immature personality. 3. Family and social environment Many investigations have shown that childhood trauma, disharmonious family relationships, poor family education and poor social environment factors play an important role in causing the disease.