Recurrence of cerebral infarction varies from person to person and is related to both the patient’s lifestyle and whether regular preventive treatment is given after the onset of the disease. Some of them can recur within a year, years, or months after the onset of the disease, or they may not recur for a long time. If patients are given long-term secondary preventive treatment after the onset of the disease, such as oral aspirin for antiplatelet aggregation, oral statins including simvastatin, resevastatin and atorvastatin for lipid regulation and plaque stabilization, the risk of relapse may be reduced, and lifestyle improvement should be given, such as a low salt, low fat and low sugar diet, and abstaining from smoking and alcohol, participating in physical exercise and weight control, as well as Control of risk factors includes controlling the patient’s blood lipids, blood glucose and blood pressure. In case of hyperhomocysteinemia, homocysteine lowering treatment is given, and commonly used drugs include vitamin B6, folic acid tablets, adenosine cobalamin and methylcobalamin, etc.