Abstract: Objective In order to improve accuracy of forensic expert conclusion and provide scientific and reasonable accordance for revising identifying criteria for the injury degree,correlation between clinical classification and injury certification of acute closed head trauma were explored. Methods A total of 30 cases about acute closed head trauma were selected. Comparison and analysis were made about their differences and the correlation between the clinical classification and the injury degree certification. Results Mild craniocerebral injury is equal to mild or moderate injury,moderate craniocerebral injury is equivalent to mild or severe injury,severe craniocerebral injury is mostly equivalent to severe injury. Conclusion There are some correlation between the clinical classification and the injury certification in acute closed head trauma. It is necessary to refer to the criteria of clinical classification when revising identifying criteria for the injury degree so as to enhance scientific rigor and rationality.

Key words: forensic medicine, head injuries, closed, clinical classification, damage degree, case analysis