The incidence of congenital heart disease is about 1%, and its cause is still unknown. It is an important congenital disease that seriously affects the growth and development of children, and even leads to their death. But fortunately, medical science has advanced to the point where most congenital heart diseases can be corrected through surgery. Surgery for congenital heart disease should be performed as early as possible to avoid the impact of heart malformation on the growth and development of the child and to reduce the mental and financial burden on the parents and the family of the child. However, the younger the child is, the more difficult and risky the surgery will be. Therefore, the timing of surgery for precocious heart disease depends on the severity of the patient’s heart malformation, the degree of impact of the disease on the child’s growth and development, the prognosis of the development of the disease and the level of equipment and technology of the hospital where the patient is seen. The current principles for the timing of surgical treatment for patients with precardiac disease are: 1. If the heart malformation endangers the life of the child, conditions should be created to actively seek surgical opportunities to save the child’s life. For example, if a child with complete transposition of the great arteries with intact ventricular septum is not operated in time, the child will die early, and most of these children can only perform anatomical correction surgery (transposition of the great arteries) within two weeks after birth. Therefore, we should seek early medical attention to get the chance of surgery. 2, huge atrial and ventricular septal defect, atrioventricular canal malformation, arteriovenous ductus arteriosus and complete pulmonary vein ectopic drainage, etc., children with recurrent pulmonary infections, heart failure, developmental arrest, etc., can be operated within 3-6 months after birth; some children do not have the above symptoms, but the heart enlargement is obvious, there is a tendency to occur severe pulmonary hypertension, should also be operated early, preferably within 6-12 months after birth. 3, cyanotic precordial disease (such as tetralogy of Fallot), if the child often severe hypoxic episodes, should be operated as early as possible to avoid hypoxia leading to brain damage in the child. If hypoxia is not obvious, it can be corrected surgically after 6-12 months after birth. 4, Other types of precardiac disease, if not life-threatening to the child, can be treated by elective surgery, but in order not to affect the child’s schooling and development, it is advisable to operate before school age (2-5 years old). 5, there are some precardiac disease surgery treatment timing has its own special characteristics, such as the right ventricle double outlet, etc. need to use the heart outside the tube to correct the deformity, or some complex deformity need to perform full cavity pulmonary artery connection surgery, the child is required to 3 – 5 years old after the operation. Therefore, if you find or suspect that your child has precardiac disease, you should go to a cardiovascular surgery specialist as soon as possible to receive guidance from a specialist, so as not to miss the opportunity to treat the disease.