The treatment of vitamin D deficiency in children is mainly from the following aspects: The first aspect is to give children sufficient doses of vitamin D to help them absorb calcium from the intestines and reduce the symptoms of rickets. If there is difficulty in taking vitamin D orally it may be necessary to inject vitamin D intramuscularly, and after intramuscular injection of vitamin D, attention should be paid to appropriate calcium supplementation. The second aspect is that the child’s nutrition is very important because malnourished children are more likely to have vitamin D deficiency and only ensure adequate caloric, food intake. Only when the problem of malnutrition is solved will the problem of vitamin D deficiency be fundamentally solved. The third aspect is to pay attention to a certain amount of time outdoors every day, and to get more sunlight to promote the synthesis of vitamin D in the skin, which will help alleviate the clinical symptoms of vitamin D deficiency.