The prevention of Alzheimer’s disease is mainly from the following aspects: first, the regulation of diet. For patients with dementia, it is important to regulate the diet, advocate a low-salt, low-fat, low-sugar diet, and do not eat foods that are more stimulating and high in fat. Second, exercise. Keep a regular exercise routine. Third, the psychological adjustment, to be more social contact. More social communication, more contact with people, so for dementia is a certain benefit. To avoid excessive exertion, excessive alcohol consumption, and excessive smoking. Fourth, anti-atherosclerosis treatment, as well as hypertension, diabetes, may cause cerebral infarction, cause dementia disease, to carry out rehabilitation, symptomatic treatment. Fifth, the outside world should be interested enough to keep using the brain. If the brain is not used frequently, the brain cells and nerve function will gradually decline, thus aggravating the aging of the brain and causing the aggravation of dementia.