Calcium deficiency in 4-year-old children need to eat milk, soy products and other high-protein, high-calcium food, in addition, for the serious calcium deficiency of children need to follow the doctor’s instructions to supplement vitamin D and other drugs. Usually, when a 4-year-old child is deficient in calcium, it is recommended to adjust the structure of the diet first, from the food to supplement. Children need to eat more foods rich in protein and calcium, such as milk, soy products, eggs, lean meat, quail eggs, nuts, fish, shrimp, shrimp and so on. However, due to the limited ingredients contained in food, it cannot replace medication. Therefore, for children with severe calcium deficiency, they need to take vitamin D and other vitamin D supplementation drugs under the guidance of a doctor, and if there is increased neural excitability and twitching of the hands and feet caused by calcium deficiency, calcium gluconate can be used intravenously according to the doctor’s instructions. In short, when the 4-year-old child calcium deficiency, you need to go to the hospital in time, strengthen the dietary management, if necessary, need to cooperate with the doctor to actively use medication, so as not to delay the condition.