The staging of acute cerebral infarction is mainly divided into four phases: the first one, the re-flow phase. Mainly symptoms appear in 3-6 hours, if timely brain protection treatment is taken to restore blood flow, it is likely that the damage to the cerebral nerve can be reversed again. Second, the period of cerebral edema and increased intracranial pressure. This period has been more than 6 hours, in the treatment is mainly symptomatic treatment, anti-brain edema, prevention of complications. Third, the recovery period. The main thing is the gradual disappearance of cerebral edema and intracranial pressure, and entering the recovery period. Nutrition of cerebral nerves, improvement of cerebral metabolism, active control of blood pressure and active rehabilitation training are necessary. Fourth, the sequelae period. Generally it is 1 year later. Symptoms of neurological deficits can only be seen through rehabilitation training to see if certain effects can be achieved. The staging of acute cerebral infarction is generally divided into four stages.