Patients with cerebral infarction can take deep-sea fish oil because it contains a large amount of lecithin, which has a positive effect on the softening of blood vessels, lowering blood lipids and improving atherosclerotic plaques, and can prevent the recurrence of cerebral infarction and improve symptoms. However, for the prevention of cerebral infarction, it is also necessary to start regular secondary prevention of cerebrovascular disease, long-term oral aspirin, and lipid-lowering drugs for elevated blood lipids. In addition to drugs, we should also pay attention to diet, which must be low-salt and low-fat diet, usually a light diet, more fruits and vegetables, more water to dilute the blood to avoid excessive viscosity of the blood, usually do not eat too greasy food, and fried, healthy lifestyle, regular work and rest, and avoid smoking and limit alcohol.