Alzheimer’s disease is a degenerative disease of the central nervous system that occurs in the pre-geriatric and geriatric age group. The main manifestation of the patient is progressive cognitive dysfunction and behavioral impairment, which belongs to the degenerative changes of the central nervous system. The patient’s clinical symptoms are mainly characterized by memory impairment as the first symptom, and there may also be some other mental symptoms, but memory loss is the main symptom, which will gradually affect the patient’s cognitive ability, affecting the patient’s attention, executive ability, language ability, and spatial judgment ability, all of which will be reduced to a certain extent. When the disease progresses to a certain degree, the patient will show dementia, such as fatigue, anxiety and other emotions for some complex things, and will also show personality disorders, such as personality changes, unkemptness, untidiness, impatience, irritability and so on. In severe dementia, the patient will show loss of speech, emotional indifference, crying and laughing, unable to carry out simple daily life, such as dressing, eating, need to rely on other people to take care of, the patient is in a bedridden state.