Abstract
In this paper, thoracic and abdominal injury of motor vehicle occupant was analyzed in detail. In-depth accident sampling and investigation with medical and engineering network was examined. A total of 48 accidents with 58 patients injury data was collected. We analyzed the relationships between frequency distribution of thoracoabdominal injury and vehicle equivalent barrier speed (EBS), crash direction, restraint system type and use, contact components. The results show that EBS 35 km/h, frontal and nearside impact are associated with thoracoabdominal AIS 3+ injury. Lap and shoulder belt and airbag are affected with internal organs(lung, liver, mesentery, e.g.) injury and rib fracture.