Previously, kidney stones were mostly seen in adults, but in recent years, there is a rising trend of kidney stones in children. The formation of kidney stones in children is mainly related to genetics, abnormal metabolism of the body, nutritional status, dietary habits and blind supplementation of calcium preparations and vitamin C. To effectively prevent the occurrence of kidney stones in children, the following points should be done: 1. Reasonable calcium supplementation: blind excessive calcium supplementation is an important reason for the occurrence of kidney stones. As the human body has limited absorption of calcium, failure to absorb will cause calcium precipitation, more serious problems such as brain calcification. Therefore, we should reasonably supplement calcium according to the actual situation. For infants and children with mild calcium deficiency symptoms, the total daily intake of vitamin D should be 400 units, minus the daily intake of calcium in milk powder, which is the dose of calcium that infants and children need to supplement; if there are serious calcium deficiency symptoms, calcium supplementation should be intensified, which needs to be done with trace element examination and according to medical advice. 2, moderate supplementation of vitamin C: usually, the human body does not lack vitamin C, there is no need for additional supplementation. Some parents think that vitamin C is water-soluble and will not lead to poisoning, and can improve the immunity of children, so they give children uncontrolled vitamin C supplements, and as a result, too much vitamin C makes the urine acidic, resulting in too much oxalate, causing the formation of kidney stones in children. 3, build a reasonable diet structure: try to avoid high-protein, high-calorie, low-fiber diet, such as children’s more favorite food from KFC, McDonald’s and other fast food restaurants. 4, improve the quality of family drinking water: because the kidneys of children under 4 years old are more delicate, can not afford too many minerals, formula for children’s development of the minerals needed is enough, if the water quality is too hard for infants to brew milk powder, regular drinking will also cause kidney stones, to improve the quality of family drinking water, such as tap water from the water pipe after a period of time to settle, and then boil before brewing milk powder or drinking.