(I) Basic measures: 1. Adjustment of lifestyle (1) A balanced diet rich in calcium, low in salt and moderate in protein. (2) Pay attention to appropriate outdoor activities, physical exercise and rehabilitation that contribute to bone health. (3) Avoid smoking, alcohol abuse and the use of drugs that affect bone metabolism, etc. (4) Take various measures to prevent falls: for example, pay attention to the presence of diseases and drugs that increase the risk of falls, and strengthen protective measures for yourself and the environment (including various joint protectors), etc. 2, bone health basic supplements (1) calcium: China’s Nutrition Association formulated the recommended daily calcium intake of adults 800mg (elemental calcium amount) is the ideal bone peak to maintain bone health, if the supply of calcium in the diet is not enough to choose calcium supplements, postmenopausal women and the elderly daily calcium intake recommended amount of 1000mg. Calcium intake can slow down the loss of bone and improve bone mineralization. When used for the treatment of osteoporosis, it should be combined with other drugs. There is insufficient evidence to suggest that calcium supplementation alone can replace other anti-osteoporosis drug therapy. Calcium selection should take into account its safety and efficacy. (2) Vitamin D: facilitates the absorption of calcium in the gastrointestinal tract. Vitamin D deficiency can lead to secondary hyperparathyroidism, which increases bone resorption, thus causing or aggravating osteoporosis. The recommended dose for adults is 200 units (5ug)/d, while older adults often have vitamin D deficiency due to lack of sunlight and impaired intake and absorption, so the recommended dose is 400-800 IU (10-20ug)/d. Some studies have shown that vitamin D supplementation increases muscle strength and balance in older adults, thus reducing the risk of falls and thus reduce the risk of fractures. Vitamin D should be used in combination with other medications when used for the treatment of osteoporosis. The clinical application should pay attention to individual differences and safety, regularly test blood and urine calcium, and adjust the dose as appropriate. (B) Drug treatment Indications for drug treatment: people with existing osteoporosis (T≤-2,5) or who have had fragility fractures; or those with existing bone loss (-2,5