Most congenital heart diseases can be treated surgically, and most patients can achieve normal heart function after surgery, but the appropriate timing of surgery is very important, generally speaking, 3-8 years old is the most suitable age for most congenital heart diseases. Recently, it is advocated that surgery should be performed before school age so that it does not affect children’s learning, and at the same time, the psychological experience brought by surgery at an early age is less than that of older children, and the impact on the psychological and physical growth of the child is also less. If the severity of the lesion does not allow waiting, the surgery can be performed earlier, but the mortality rate is higher. Since children after the age of 3 are more cooperative with the surgery, they recover faster after the surgery. If the best surgery period is missed, the child may be left with different degrees of damage to other organs, especially damage to the pulmonary artery vessels, such as pulmonary hypertension, and the opportunity for surgery may be lost in severe cases. If the child is within 2 years of age, some children may undergo palliative surgery first and then corrective surgery later. Patients who are too old, especially those over 30 years old, are more likely to have irreversible damage to their organs due to long-term cardiac overload, and the risk of surgery increases accordingly. If your child is suspected of having congenital heart disease, please have an ultrasound examination of the heart as soon as possible. If congenital heart disease is diagnosed, you should see a cardiac surgeon as soon as possible, who will tell you the most suitable time for surgery.