Funnel chest is a congenital and often familial condition. The forward bulging of the sternum is called pectus excavatum. Pectus excavatum is a common thoracic deformity that is generally considered to be as genetically related as the funnel chest deformity, and most people believe that it is caused by overgrowth of the ribs and rib cartilage, and that the deformity of the sternum is secondary to the rib deformity. Chest wall deformities affecting respiratory circulation, such as funnel chest, chicken chest, pectoral cleft, etc., in addition to the mental burden and character effects caused by the deformity, the thoracic deformity caused by funnel chest is more serious, and the organs in the chest cavity, heart and lungs, are compressed to varying degrees, even causing heart displacement, and lung ventilation function is also affected, such as further development, but also prone to respiratory infections and other serious diseases. Sometimes it can be combined with pulmonary hypoplasia, asthma and other diseases. So the damage to respiratory and circulatory function by the deformity itself also requires surgical correction. The diagnosis of funnel chest includes 4 aspects, namely confirming the diagnosis, clarifying the degree and judging the presence or absence of thoracic organ compression and combined deformities. Funnel chest can be diagnosed immediately based on visual examination of the thorax, mostly from the 3rd rib to the 7th rib with inward depression and deformation, with the deepest depression above the sternal saber and the anterior end of the saber cocked anteriorly. The anterior part of the ribs slopes sharply downward from the posterior top, the upper and lower thorax becomes longer, and the distance between the anterior and posterior diameters is shortened. In severe cases, the deepest depression of the lower part of the sternum may contact the spine, or even reach the side of the spine, producing cardiopulmonary compression symptoms. According to the location of the sternal depression of funnel chest, it can be divided into two types of symmetric depression and asymmetric depression. The asymmetric depression is more common on the right side, and the ventral surface of the sternal body is turned to the right side and can be rotated by 90° in severe cases.