The life expectancy of people with Alzheimer’s disease varies from person to person, usually 5 to 10 years. Alzheimer’s disease itself does not directly lead to death, and the life expectancy is related to factors such as post-care and co-morbid underlying diseases. The life expectancy of people with Alzheimer’s disease is closely related to the care they receive at a later stage, and the concern of their family and society. Without good care, most patients become bedridden in about 5 to 10 years, and the incidence of complications increases after becoming bedridden. Most of the complications are mainly lung infections and bedsores, which can directly affect the patient’s life expectancy. If late care in place, family members can timely care and concern, or can go to the hospital for formal treatment, the patient can be well avoided due to lung infections and bedsores, etc. affect life expectancy. With early and aggressive intervention and proper care, a few patients may survive for more than 10 years. Currently there are no drugs that can effectively reverse the course of Alzheimer’s disease, and how long Alzheimer’s patients can live varies from person to person. Scientific nursing care is particularly important to reduce the probability of serious complications, and thus prolong the patient’s life to a certain extent.