Patients with cerebral infarction have benefits from taking folic acid tablets, especially those who also have hyperhomocysteinemia, which should be treated with folic acid tablets, and should be treated with vitamin B6 and methylcobalamin at the same time. Current research shows that folic acid deficiency in the body can lead to impaired homocysteine metabolism, resulting in hyperhomocysteinemia. Hyperhomocysteinemia can cause cerebral atherosclerosis, and severe atherosclerosis can lead to endothelial destruction, plaque formation in blood vessels, and narrowing of blood vessels, which eventually leads to occlusion of blood vessels and causes cerebral infarction. Supplementation of folic acid, vitamin B6 and methylcobalamin promotes the metabolism of homocysteic acid to prevent the occurrence of hyperhomocysteinemia, which also prevents the occurrence of atherosclerosis. Therefore, it is beneficial for patients with brain infarction to take folic acid tablets.