The purpose of homocysteine test is to screen whether the patient’s homocysteine is elevated. Epidemiological studies have found that hyperhomocysteinemia is one of the independent risk factors leading to cardiovascular and cerebrovascular atherosclerosis, the higher the level of homocysteine in the blood, the higher the risk of suffering from atherosclerosis and thrombosis, and the higher the incidence of cardiovascular and cerebrovascular diseases. It is suggested that patients should supplement folic acid, vitamin B6 and vitamin B12, etc., which can help to reduce the level of homocysteine in the blood, and eat more vegetables and fruits, especially green leafy vegetables rich in folic acid and vitamins, and lean meat rich in vitamin B12, and pay attention to a reasonable combination of the daily diet, which is very important to slow down the occurrence of atherosclerosis.