With the continuous improvement of medical treatment, the detection rate of infantile precocious heart disease has increased, and about 60% of children with precocious heart disease are infants and children. Generally, if surgery is performed within 2 years of age, about 98% of the children can survive and 90% of the children can live like normal people after surgery. For parents, they should pay more attention to observe their children, once the following manifestations appear, they should go to the regular hospital for timely diagnosis: 1. heart murmur: normal children’s heartbeat is like a pendulum, a group of two sounds, each one is very clear; children with precordial disease are heard in the child’s chest between the two sounds like blowing wind, machine start-like sound, some children can feel the tremor in the chest. 2, mouth, lips, nail beds of the fingers and toes bruising, bruising after crying. 3.Frequent colds, recurrent pneumonia or respiratory infections. 4.Poorer growth and development, wasting, and weak cry. 5.Infants usually have shortness of breath, difficulty in breastfeeding, coughing and choking, breath-holding. 6.Poor physical strength, easily fatigued, out of long breath. 7, there is the phenomenon of squatting: infancy holding when the legs are not straight, but like to bend in the adult’s abdomen, sitting like to lift the feet to the stool surface, standing when the lower limbs to maintain a bent posture. After walking for a while, older children will squat down and rest for a while with both knees close to the chest. If the child has the above symptoms, the child is more likely to suffer from precocious heart disease, and should promptly go to a regular hospital for examination to confirm whether the child is suffering from precocious heart disease, and seek consultation with a regular pediatric precocious heart disease specialist, so that they can receive timely and effective treatment.