Calcium supplementation for newborns with calcium deficiency: 1. Supplement enough milk source. Because milk is the best source of calcium supplement for children, children’s absorption of milk source is better. If the child has enough milk intake, generally will not lead to calcium deficiency.2, vitamin D supplementation. Because vitamin D belongs to the promotion of calcium absorption of trace elements, if the child has a vitamin D deficiency, although there is enough milk supplement, but can not be utilized by the body, will also lead to the child to appear calcium deficiency, thus appearing more sweating, easy to wake up at night, crying and restlessness, etc. 3, supplementation of calcium supplementation drugs, it is recommended to use oral calcium gluconate, calcium carbonate granules, the calcium absorption of these two drugs is relatively good. These two drugs are relatively good at absorbing calcium. In addition, after supplementing calcium, we should review the child’s vitamin D and blood calcium level in time, so as to decide the specific course of calcium supplementation.