The presence of chicken breast in a baby’s physical examination may be associated with causes such as congenital malformations or the presence of nutritional vitamin D deficiency rickets. Chicken breast-like deformity is formed by the forward protrusion of the sternum and adjacent cartilage. If there is a family history of chest wall deformities, the baby may develop a congenital thoracic deformity that gradually presents as a chicken chest with age. Babies can be due to nutritional vitamin D deficiency in the body caused by rickets, the body calcium, phosphorus metabolism disorders, about one year old children can form chicken chest-like deformities, rickets beads or hand and foot bracelets and other manifestations of severe rickets can appear rib diaphragm groove. Babies found in the physical examination of chicken chest, it is recommended to go to the hospital specialist in time, improve blood biochemistry, bone X-ray and other related examinations, targeted treatment.