Cerebral infarction, also known as ischemic stroke, is a limited ischemic necrosis of brain tissue due to impaired blood circulation, ischemia and hypoxia in the brain. Cerebral infarction is the most common type of cerebrovascular disease. Irreversible damage to nerve cells and cerebral infarction occurs when the interruption of blood flow in the cerebral arteries lasts for 5 minutes. Acute cerebral infarction is composed of the ischemic central area and the surrounding ischemic semidark zone. The brain tissue in the ischemic semidark zone still has a large number of surviving nerve cells, and if the blood supply to the brain tissue in the ischemic semidark zone can be restored quickly, the nerve cells can survive and recover their functions. As the degree of ischemia increases and the duration of ischemia lengthens, the central infarct zone will gradually expand and the ischemic semidark zone will gradually shrink. Therefore, early restoration of blood supply to the ischemic semidark zone and application of effective cerebral protective drugs are very important to reduce the disability rate of cerebral infarction. The etiology of cerebral infarction is complicated, the most important is the narrowing of blood vessels due to various lesions, such as atherosclerosis or arteritis, etc.; the second is the formation of blood clots due to various reasons, such as the rupture of plaques formed by atherosclerosis, the dislodgement of cardiac emboli formed by atrial fibrillation; there are also some causes due to insufficient cerebral blood perfusion, blood hypercoagulation state, etc. The clinical symptoms of cerebral infarction vary in severity and diversity, and the main symptoms are weakness and numbness of one side of the limb, slanting of the mouth and tongue, slurred speech or incomprehension of others’ speech, etc. Some patients also show dizziness, which can be a sense of spinning, or just a sense of dizziness, double shadows in vision, difficulty in swallowing or choking on water, or slanting to one side when walking, or pain in the deviated body, or shaking of limbs, etc. Atypical If the area of cerebral infarction is large or the key part of cerebral infarction occurs, it will lead to confusion or even coma of the patient, and it may also involve the respiratory and circulatory center to endanger the life of the patient. Therefore, cerebral infarction is a complex process and has a high disability and mortality rate, but most patients with mild cases can live on their own or even completely without sequelae through active treatment and prevention.