Lack of nutrition during childhood makes it easy to develop chicken chest and square cranial deformity, etc. Chicken chest is mainly due to the lack of vitamin D in childhood, resulting in insufficient absorption of calcium in the body, thus lacking raw materials in bone formation growth, no projection surface in the growth of the thorax and sternum, and collapse of the sternum, forming chicken chest deformity. Chicken chest is commonly known as the sequelae of rickets in childhood, because of the lack of vitamin D, lack of calcium, children’s thoracic bony structures do not get sufficient calcium raw materials, thus leading to the collapse of the sternum deformity, the formation of chicken chest. Therefore, during childhood, attention should be paid to vitamin D supplementation, more sunlight, more milk, more calcium to improve bone density, while avoiding rickets and chicken chest.