The staging of acute cerebral infarction is mainly divided into four phases: the first one, the reflow phase. Mainly, the 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 brain nerves can be reversed again. The second, the period of cerebral edema and elevated intracranial pressure. This period has exceeded 6 hours, in terms of treatment is mainly symptomatic treatment, anti-cerebral edema, prevention of complications. The third period is the recovery period. The main thing is that cerebral edema and intracranial pressure gradually disappear and enter the recovery period. It is necessary to nourish the brain nerves and improve the brain metabolism, as well as actively control the blood pressure and actively rehabilitate. The fourth period is the sequelae period. Usually it is 1 year later. The symptoms of neurological deficits can only be achieved through rehabilitation training to see if a certain effect can be achieved. The staging of acute cerebral infarction is generally divided into four stages.