Zinc is an essential mineral element for the growth of children and is a component of many enzymes in the body. If deficient for a long time, it can seriously affect the growth and development of children and the regeneration of body tissues. The first thing that happens when a child is deficient in zinc is a loss of appetite, picky eating and anorexia, because zinc deficiency causes the tongue mucosa to not function properly and the taste function to begin to decline. Zinc deficiency causes abnormal activity of more than 80 enzymes in the body and slows down cellular metabolism, which can lead to delayed development of the baby. It also causes skin disorders such as ulcers, peeling of the tongue and acne, and wounds that do not heal easily. Zinc has a catalytic effect on life activities and can improve children’s autoimmunity. Zinc deficiency leads to a decrease in immunity and makes children susceptible to germs and respiratory infections, such as tonsillitis, pneumonia and bronchitis, which are easily recurring and do not heal easily, and often lead to colds and fevers. Vision also tends to decline, leading to myopia, farsightedness, astigmatism and so on. Severe cases in the intellectual development will also have an impact, such as hyperactivity, inattention, poor learning ability, slow reflection of limbs, etc. The zinc deficiency in the baby’s organism will seriously affect the baby’s physical development, and it is recommended to determine the treatment plan through the examination of trace elements, and not to blindly abuse them to avoid secondary damage to the baby.