How long a person can survive in an intensive care unit with severe craniocerebral injury cannot be generalized, but depends on the condition of the disease and the physical condition of the patient. Usually it is within 7 days, 1~3 months, or the condition may be stabilized and transferred to general ward for rehabilitation. According to the degree and location of craniocerebral injury, the progress of the disease and whether there are underlying diseases, the specific analysis is as follows. 1.Within 1 week: the patient’s vital signs are unstable at the time of admission, Glasgow Coma Score is 3~5, the patient has consciousness disorder, the damaged area of skull and brain tissue is large, CT and MRI show large hemorrhage, and complications such as cerebral herniation and cerebral edema, the survival time in the intensive care unit may be around 1 week, or even death in a short period of time. 2.1~3 months: patients are admitted to the hospital for timely rescue, vital signs can be maintained basically stable, and there is no injury to the brainstem and other vital centers, through surgery and active treatment to reduce the pressure of cerebral edema, the survival time of patients can be maintained as much as possible. However, if the patient himself has hypertension, diabetes and other basic diseases, the body’s own compensatory capacity is poor, the survival may vary from 1 to 3 months. 3. Rehabilitation: When patients are admitted to the hospital with mild craniocerebral injury, their vital signs are stable, and after surgery to reduce cerebral edema and hemorrhagic foci, they are likely to be stabilized and transferred to general wards and undergo rehabilitation treatment. Therefore, when patients with severe craniocerebral injury are treated in the intensive care unit, they should not lose confidence and follow the doctor’s instructions to cooperate with the doctor to treat the disease actively.