Precordial disease is definitely carried after birth, but according to the patient’s development, the best age for interventional treatment of precordial disease is generally above 2.5 years old, but different diseases are different, such as patients with unclosed arterial ducts or pulmonary valve stenosis, which affect growth and development and lung development, they have to do surgery very early, generally 5 months old size can start to do surgery. Arterial catheterization can be started at 7-8 months. If the patient can be delayed, it is better to do the surgery after 2.5 years of age, and there is no upper age limit for doing precordial disease. There is no upper limit to the age of prematurity, because the age of children is generally from birth to 16 years old, and they should be able to do surgery at this stage. The earlier the surgery can be done, the greater the benefit to the patient, because the process of growth and development, such as school and sports, will increase the burden on the heart. Once a patient has predilection, the burden on the heart will increase, and if the patient is cyanotic, it will seriously affect the patient’s growth and development. It does not affect the patient physically and mentally until kindergarten, so try to start the surgery at a younger age, so parents should be aware of their child’s growth and development and precocious heart disease, and the younger the surgery, the better.