Rickets is a nutritional disease caused by a deficiency in vitamin D, leading to disturbances in calcium and phosphorus metabolism in the body, which results in abnormal bone development. It is mainly due to a lack of vitamin D, so the primary treatment is supplementing with vitamin D. Dairy is a reliable source of calcium nutrition for infants, and generally, it is not necessary to supplement calcium for the treatment of rickets; attention should be paid to supplementing with vitamin D according to the severity of the condition, and spending more time in the sun. For children who have started eating complementary foods, or older children, it is generally recommended to fully supplement vitamin D levels, spend more time in the sun during summer, and consume high-protein nutrients. Additionally, eating more vegetables and appropriately supplementing with calcium supplements in the winter is advised. The dosage should be based on the child's internal levels of calcium and phosphorus, with calcium supplementation adjusted accordingly.