Cerebral contusion is the most common type of closed brain injury and refers to organic damage to brain tissue caused by violence to the head. It includes two types of contusions and lacerations. The clinical manifestations of cerebral contusions vary widely depending on the extent and nature of the injury site, as well as the combination of injuries. In mild cases, there is no primary impairment of consciousness, which is sometimes difficult to distinguish from concussion, while severe cases can lead to coma and severe impairment of neurological function until death. 1, consciousness disorders: patients with severe cerebral contusions are mostly comatose immediately after the injury, for half an hour, hours or days in short cases, or weeks or months in long cases, and some are in a continuous coma or vegetative survival. 2, vital signs change: often more obvious. At the time of injury, there can be a fine pulse rate, blood pressure drop and slow respiratory performance, most of the rapid recovery, such as blood pressure continues to drop, it suggests that the brainstem injury is serious or other combined injuries. When the blood pressure and heart rate return to normal, the patient appears to have increased blood pressure, slow and strong pulse, and deep and slow breathing, which indicates the compensatory response caused by increased intracranial pressure and cerebral hypoxia. If the brain damage is serious and the intracranial pressure continues to increase, it will eventually lead to central failure. 3, focal signs and symptoms: neurological dysfunction or signs corresponding to the injury foci appear immediately at the time of injury, such as limb convulsions and paralysis in motor area injury, aphasia in language center injury and loss of brainstem reflexes in comatose patients. 4, increased cranial pressure: for secondary cerebral edema or intracranial hematoma caused. 5.Headache and vomiting: patients often have severe headache and frequent vomiting after waking up, which often lasts for a long time. Generally, based on the history of trauma, a longer period of coma after injury, the presence of positive neurological signs and cerebrospinal fluid hemorrhage, the diagnosis is basically established, and CT can clarify the diagnosis.