The average life expectancy of the elderly in China is seventy-nine years, and the average life expectancy of women is higher than that of men. The main factors affecting the life expectancy of the elderly are disease, psychology, environment and accidents, etc. Currently, the top three diseases that cause death among the elderly in China are stroke, tumor and coronary heart disease. In addition, chronic diseases such as chronic obstructive pulmonary disease, Alzheimer’s disease, hypertension and diabetes are also common causes of death among the elderly. Therefore, if elderly people want to improve their life expectancy with quality, they must adhere to a good diet and lifestyle habits, eat more fresh fruits and vegetables, eat less unhealthy foods such as greasy and fried foods, strengthen exercise, improve their immune function, perform regular physical examinations, manage chronic diseases, and treat various physical and psychological diseases in a timely manner.