The normal value of bone density in 70-year-olds is T value ≥ -1, if the bone density of the elderly is less than this value, and accompanied by other uncomfortable clinical manifestations, you need to consult a doctor in time. T-value indicates that the measurement of the patient’s bone mineral density and normal bone peak value of young people of the same sex difference, -2.5<T-value<-1.0 indicates that the patient’s bone mass is reduced, T-value ≤ -2.5 can indicate that the patient has osteoporosis, T-value ≤ -2.5 and the combination of fragility fracture, usually indicates that the patient has a serious osteoporosis, found that osteoporosis should be treated in a timely manner. The 70-year-old should have regular bone density checkups. According to the osteoporosis guideline, middle-aged and high-aged elderly are prone to malnutrition, so they can consume sufficient calcium through their diets, and elderly people suffering from osteoporosis should also pay attention to preventing falls.