1.Pre-operative precautions In addition to routine blood, urine, electrocardiogram and other pre-surgical examinations, patients with funnel chest can undergo cardiopulmonary function tests to evaluate the impact of funnel chest on cardiac and pulmonary function, as well as changes in cardiac and pulmonary function before and after surgery. CT can more clearly show the severity of the deformity, the degree of heart compression and displacement, the degree of lung compression and other problems, and can detect funnel chest combined with other malformations In addition, CT can detect other malformations such as congenital heart disease, congenital diaphragmatic hernia, diaphragmatic expansion, cystic adenomatoid malformation, pulmonary herniation, pulmonary cysts, and especially bone metabolism disorders or endocrine diseases such as scoliosis, neurofibromatosis, Marfan syndrome, klippel-Feil syndrome, and mucopolysaccharidosis. Determine whether to operate at the same time and possible postoperative complications. A comprehensive and correct diagnosis will help to determine whether surgery should be performed and to choose the appropriate age and method of surgery. 2. Postoperative precautions (1) Fasting, sedation, lying down, cardiac monitoring and nebulized aspiration on the day of surgery. (2) The first day after surgery, you can eat and get up, and the second day after surgery, you can go down to the floor and keep your upper body straight when moving. (3) Strengthen respiratory physiotherapy to prevent and control respiratory tract infection. Apply intravenous antimicrobial anti-infection. Expectorant drugs can be used. (4) Keep the patient’s back straight after surgery to avoid bending and twisting the hip. (5) No flexion, no rotation of the chest and waist, no rolling, and keep lying down for one week after surgery. It is better to have someone to assist when getting up from bed. (6) If the body temperature is normal, the wound heals well, and the patient can walk without help in 5-7 days, he can be discharged. Take a chest X-ray for review before discharge. (7) Postoperative pain relief with epidural block or intravenous analgesic pump. (8) If vomiting is present, fasting and decompression and intravenous fluid support may be used; if constipation is present, laxatives may be used; it may be related to the use of anesthetics for pain relief.