The causes of large cerebral infarction are as follows: 1, atherosclerosis of large blood vessels: its causes are hypertension, diabetes, high blood lipids, smoking, drinking, poor lifestyle such as little movement and relatively large amount of food and other conditions, atherosclerosis is both its most common cause, but also can be called a risk factor for cerebrovascular disease; 2, aortitis: this is a disease related to the immune system; 3, traumatic injuries: it can tear the arteries and cause large cerebral infarction. Therefore, it is important to analyze the situation accordingly. Whether it is large cerebral infarction or lacunar cerebral infarction, the most common causative factor is still atherosclerosis, and in the decades before the occurrence of arterial infarction, it is necessary to pay attention to the prevention of elevation of blood pressure, blood glucose, and blood lipids, and pay attention to the maintenance of a good lifestyle, the cessation of smoking and alcohol consumption, and psychological balance. In short, cerebral infarction occurs suddenly, but arterial destruction is caused by long-term, so it is necessary to do a good job of prevention of cerebral infarction in advance, pay attention to blood pressure, blood sugar, blood lipid control and lifestyle adjustment.