Patients with adolescent idiopathic scoliosis are concerned about vitamin D levels; vitamin D deficiency affects calcium absorption and impaired bone mineralization, causing rickets, osteochondrosis, and secondary hyperparathyroidism, and, vitamin D deficiency increases bone transformation and bone loss, factors that increase the risk of osteoporosis and fracture occurrence, and patients are prone to proximal muscle weakness, twitching, and low back pain; in addition, increasing evidence shows that vitamin D deficiency is associated with the development of many extraskeletal disorders, including tumor risk, cardiovascular disease, infectious disease, and autoimmune disease, and vitamin D supplementation has been reported to be associated with reduced all-cause mortality. Sunlight exposure is recognized as a major source of vitamin D, but prolonged sun exposure usually increases the risk of skin cancer, and the traditional Chinese diet contains little vitamin D. Therefore, proper food fortification and supplementation with vitamin D is particularly important, such as mandatory requirements in the United States and Canada, all milk cartons and dairy products are fortified with vitamin D. Vitamin D fortified milk is rarely seen in the domestic market, and without vitamin D supplementation D, it is difficult to achieve ideal vitamin D levels in northern regions. Serum 25(OH)D levels reflect the overall vitamin D reserve level of the body, and the American College of Endocrinology proposed in 2011 that the ideal serum 25OHD level is above 30 ng/ml; 25(OH)D levels between 21C29 ng/ml are vitamin D deficiency; >20 ng/ml is vitamin D deficiency; <1< span="">0 ng/ml is severe Vitamin D deficiency can cause rickets in infants and children and bone softening in adults, manifesting as low back pain, calf twitching and muscle weakness. We observed more than 5000 cases of 25OHD levels of Beijing residents, vitamin D deficiency amounted to 87.4%, a figure that is alarming, women are obviously more serious than men deficiency, and adolescent students are especially common. Some adolescent students with scoliosis have 25OHD levels below the minimum test level, which is unbelievable. So I urge: 1. schools and parents, for the sake of children’s health, to increase outdoor activities, get more sunlight, do not take the beauty of fair skin, and take the initiative to supplement vitamin D preparations in winter and spring; 2. for adolescent scoliosis, make sure to check serum 25OHD and PTH levels, and for those below 20ng/ml, give vitamin D treatment as early as possible to correct vitamin D deficiency and curb 3. At present, the prevention and treatment of vitamin D deficiency is generally not a concern in China, and there is a general lack of good vitamin D preparations on the market. I suggest that vitamin D3 pills can be applied at 5,000-10,000 units/day, and the 25OHD and PTH levels should be rechecked after one month of medication, and the dosage should be reduced after reaching more than 30ng/ml, with 1,000-2,000 units Maintenance, it is not recommended to use the vitamin AD pills visible in domestic hospital pharmacies, containing 1500 units of vitamin A and 500 units of vitamin D. Too much A and not enough D. Excess vitamin A is not good for bones. 4. Do not worry about vitamin D poisoning, the Chinese Nutrition Society’s 2005 guidelines say that more than 2000 units of vitamin D will be toxic, is wrong, there is no scientific basis, foreign American Society of Endocrinology has been very clear that 10,000 units per day is very safe. 5. We applied mega-dose vitamin D3 to treat vitamin D deficiency with satisfactory results. Patients’ serum 25OHD levels reached ideal levels after medication, PTH levels decreased significantly, and almost all patients had improved convulsion symptoms and increased muscle strength.