Due to the different causes of dementia, the methods of prevention are also different, mainly in the following aspects: 1. Improve the working environment. 2.Avoid alcohol and quit smoking. 3, diet regulation: both to prevent high-fat food caused by cholesterol, but also to take in the necessary nutrients, such as protein, inorganic salts, amino acids and a variety of vitamins, especially vitamin B1, B2 and B6, vitamin C and vitamin E is very important for the elderly. 4.Keeping a happy spirit is good for longevity and mental health. 5.To arrange life and study: In old age, you should also insist on learning new knowledge and keep extensive contact with society. 6.Before leaving retirement, make all preparations ideologically and materially. Rich life content and a wide range of interests and hobbies can promote brain activity and also slow down or reduce the aging process. 7, regular physical examination, early treatment of physical diseases, their own body should not only pay attention to, but also should not pay too much attention or worry. 8.Frequent outdoor activities: the elderly are suitable for more sustained and more exercise programs, such as walking, jogging, gymnastics, taijiquan, taiji sword and traditional dance, etc. The treatment of AD is mainly the application of acetylcholinesterase (AchE) and symptomatic drugs such as anti-immune inflammatory and antioxidants to temporarily alleviate the patient’s cognitive decline. The Japan Association for Dementia Prevention recently invited experts in dementia medicine to develop 10 key tips for preventing Alzheimer’s disease: First, eat a balanced diet and avoid excessive salt and animal fats. Salt intake should be controlled to less than 10 grams a day, less animal fat and sugar, and a balanced intake of protein, dietary fiber, vitamins, minerals, etc. Second, moderate exercise to maintain a strong waist and feet. It is also important to exercise your hands. Doing some complicated and delicate handicrafts will promote the vitality of your brain, cooking, writing diary, playing musical instruments, painting, etc. all have the effect of preventing dementia. Third, avoid excessive drinking and smoking, and live a regular life. Excessive drinking can lead to liver dysfunction and abnormal brain function. People who drink more than 0.3 liters a day are more likely to get cerebrovascular dementia than the average person. Smoking does not only cause cerebrovascular dementia, but is also an important cause of myocardial infarction and other dangerous diseases. Fourth, prevent lifestyle diseases such as atherosclerosis, hypertension and obesity. Early detection and early treatment. Fifth, be careful not to fall; a fall on the head can cause dementia. Senior citizens should use crutches if necessary. Sixth, always maintain a high level of interest and curiosity about things, which can increase one’s attention and prevent memory loss. Older people should do more things of interest and participate in public welfare activities and social activities to strengthen the brain nerves. Seventh, we should actively use our brains to prevent brain decline. Even when watching TV series, you can use your brain power by expressing your thoughts at any time. Reading books, playing chess, keeping a diary, writing letters, etc. are all simple ways to help your brain power. Eighth, always pay attention to people, maintain good interpersonal relationships, and find their own survival value. Ninth, keep a young heart and dress yourself properly. Tenth, avoid being too deep, negative and sighing, and live with a cheerful mood. Senior citizens often have to face the experience of loss such as retirement, death of friends, etc. Many people thus get depression, making the immune function lower, no appetite and physical strength, and even bedridden for a long time.