Traumatic pseudoaneurysm of the descending aorta is a rare but life-threatening disease, especially in children. Open surgical replacement and thoracic endovascular repair in treating traumatic pseudoaneurysm to prevent aortic rupture rarely have been reported in children. Here, we present a rare case of aortic pseudoaneurysm caused by trauma in a 12-year -old child treated with an alternative surgical strategy. Aortic repair without an implant assisted by distal perfusion was per-formed through a left thoracotomy. The child satisfactorily recovered, was discharged, and remained in a good condition during the follow-up period.