Whether a baby needs calcium, iron and zinc supplementation should depend on the actual situation. If the body is not deficient in calcium, iron and zinc, there is no need to supplement calcium, zinc and iron; if the baby’s body is deficient in calcium, iron and zinc, it is necessary to supplement the relevant elements according to the need. Baby in the process of physical development, if the body does not lack of calcium, iron and zinc, do not need special supplementation of calcium, iron and zinc, as long as to ensure that the normal diet can be, nutrition to be balanced, do not picky about food, and more out of the appropriate sunshine. If the baby’s body lacks calcium, iron and zinc, the baby should first ensure to ensure adequate intake of breast milk or formula. If the baby is full of six months, has begun to add complementary foods, can be supplemented by dietary related elements, such as meat, eggs, milk, animal liver and other foods. If dietary supplementation is still unable to meet the need of supplementing calcium, iron and zinc elements that the baby lacks, additional supplementation of related elements can be carried out according to the doctor’s advice, such as oral zinc gluconate, vitamin D3, ferrous sulphate, etc. Parents in the baby medication, must follow the doctor’s instructions, do not give the child indiscriminate use of drugs, to avoid causing adverse consequences.