As the saying goes, in October, a baby is born. It is with great excitement that young parents finally welcome their babies. However, some babies are born with bruises on the limbs and around the mouth, and some children are born with frequent colds, pneumonia, no weight gain, and backward growth, etc. It is time to consider whether the child has congenital heart disease. So, what should parents do when their child has congenital heart disease? First of all, you should take your child to a local hospital with better technology and conditions to confirm whether your child is suffering from congenital heart disease. Nowadays, ultrasound examination has become popular, and most hospitals can check to make a preliminary diagnosis. Second, if the initial diagnosis of precocious heart disease, it is advisable to go to a specialist hospital to further confirm the diagnosis. As the level of treatment of pediatric precardiac disease has improved greatly in recent years, and the treatment of precardiac disease is more specialized, many primary care doctors have misconceptions about the treatment of precardiac disease. Age and weight are no longer contraindications to the treatment of precocious heart disease. We often encounter children with predilection for surgery in our outpatient clinics due to late presentation. For example, ventricular septal integrity with transposition of the great arteries should be treated surgically at birth; once more than three weeks have elapsed, surgical treatment becomes complicated and extremely risky. If large ventricular septal defects with unclosed ductus arteriosus are not operated early, the child will often suffer from pneumonia, delay growth and development, and develop pulmonary hypertension as the disease progresses, increasing the risk of surgery. Therefore, the child should be seen in a specialized hospital to determine the correct treatment plan. Third, children with congenital heart disease are weak and need careful parental care. Children with left-to-right shunt type of congenital heart disease, such as ventricular septal defect and ductus arteriosus, can easily catch cold and flu, and are prone to pneumonia, so parents should be patient and take care of them. In contrast, children with cyanotic precocious heart disease such as tetralogy of Fallot are prone to hypoxic attacks when they are three to six months old, so they should avoid violent crying and drink more water at night. Fourth, immunization of children with congenital heart disease is also a concern for many parents. First of all, it depends on which kind of congenital heart disease the child has and the severity of the disease. Immunization is generally not recommended for cyanotic precocious heart disease. For non-cyanotic precocious heart disease, it depends on whether the child has heart failure, and children with heart failure and pulmonary hypertension are not suitable for vaccination. Finally, parents should build confidence to overcome the disease. Due to the progress of medical science and technology, many precardiac diseases that were difficult to treat in the past are now completely curable, so parents should have the right understanding and should use a positive attitude to operate on their children in a timely manner so that they can have a normal heart early.