In patients with cerebellar infarction, the peak of cerebral edema is usually 3-7 days, and patients can pass the dangerous period in about 2 weeks. The cerebellar hemispheres are located in the posterior cranial fossa, with a small positional space. Once infarction occurs, the patient will suffer from symptoms such as dizziness, vomiting, impaired consciousness, hemiparesis of limbs, aphasia, ataxia, and so on. If the cerebral edema is more serious, the patient is prone to brain hernia, which is life-threatening. In general, the peak period of cerebral edema due to cerebellar infarction is 3-7 days. If patients are given active anti-platelet aggregation, blood circulation and blood stasis activation as well as dehydration and cranial pressure lowering treatments during the acute period, such as aspirin, clopidogrel, and mannitol, glycerol fructose, furosemide, etc., the patients can pass through the dangerous period in about 2 weeks, and get a relatively good prognosis. Patients with cerebellar infarction who have passed the risk period need to continue rehabilitation exercise after discharge from the hospital, control the risk factors of cerebral infarction, and take low-salt and low-fat diet as the main focus.