The aim of this study was to identify the characteristics of emotional behavioral problems stemming from experiences of childhood trauma and to verify the effects of such experiences on adolescent development with a special focus on the mediating effects of Alexithymia. A self-reporting questionnaire and statistical analysis were conducted on 258 high school students nationwide. 133 adolescents who had experienced childhood trauma were compared with 125 adolescents who had not experienced trauma. Using a total of 258 pieces of data, the relationships between the variants were identified and hypotheses were tested. The study verified the existence of differences between the childhood trauma experience group and the non-experience group, confirmed correlations among all three variables in the study found evidence that Alexithymia partially mediated the relationship between frequency of childhood trauma experiences and traumatic-related symptoms of the adolescent. Based on the above results, we discuss the suggestions for the prevention and treatment of traumatic symptoms in adolescents by using Alexithymia as well as the limitations of this study.