The maintenance after the cerebral infarction is well is mainly long-term secondary prevention, including long-term oral aspirin and clopidogrel antiplatelet aggregation and oral statins, such as resulvastatin and atorvastatin, to regulate lipids and stabilize plaque. Risk factors should also be controlled, for example, patients with hypertension should have their blood pressure actively controlled and stabilized, often with oral treatment with levamlodipine and amlodipine benzoate. For patients with diabetes mellitus, blood glucose should be actively regulated to keep it around 6mmol/L. Metformin is usually applied orally, and if necessary, insulin can also be injected subcutaneously for treatment. For patients with hyperhomocysteinemia, they should take oral vitamin B6, adenosine cobalamin, methylcobalamin and folic acid tablets to lower homocysteine and try to bring homocysteine down to normal. At the same time, they should quit smoking and alcohol, exercise appropriately to enhance physical fitness and increase vascular elasticity to prevent the occurrence of reinfarction.