Funnel chest is a common disease in cardiothoracic surgery. The incidence of funnel chest is 1/1000, and it is a congenital deformity of the thorax with the lower part of the sternum depressed inward and the adjacent rib cartilage also depressed with it, forming an appearance like a “funnel”, hence the name “funnel chest”. The inward depression of the sternum squeezes the vital organs of the chest cavity, and the compression of the heart and lungs causes reduced mobility and shortness of breath. The symptoms of cardiopulmonary compression are usually mild at birth and worsen with growth, often becoming very pronounced in adolescence. In mild funnel chest, there is little effect on circulatory breathing. In severe cases, the sunken sternum and ribs of the funnel chest can compress the heart, lungs, and other internal organs of the chest, making children with funnel chest prone to respiratory infections, poor exercise tolerance, thin body shape, and a preference for quietness and immobility. These children are often ashamed to expose their foreheads in public, afraid to wear tank tops in summer, afraid to take baths in public bathrooms, afraid to go swimming, and individual patients even develop psychological isolation. Younger children with mild funnel chest do not need to be treated urgently because of the small impact on respiratory circulation, and may correct themselves with growth and development. For children with moderate and severe funnel chest, early surgical treatment is recommended to correct the deformity. In general, surgical treatment can significantly improve the appearance of the thorax, relieve the compression of the heart and lungs by the sunken sternum, significantly reduce respiratory infections, and improve mobility and endurance, while relieving the psychological stress of the child and improving his mental state.