Children with precocious heart disease grow with the disease for a long time, especially cyanotic precocious heart disease, because the disease becomes more and more aggravated with age, the children can not play like normal children, this special environment with the growth of the disease, affecting the formation and development of the character of the children. We found that the psychological characteristics of children with precocious heart disease are manifested in the following aspects, namely, children with precocious heart disease are more introverted than normal children, emotionally unstable, and have lower social adaptation ability, and children with cyanotic type have lower life adaptation ability than non-cyanotic type. Psychologists believe that from birth to 5 or 6 years old is the most important stage of personality formation in life. During this stage, the majority of children live in families and grow up under the loving care of their parents, and their parents’ educational attitude and social requirements make a deep impression on children’s mind through their families. Families of children with precocious heart disease differ greatly from those of normal children, and the overprotective and coddling parent-child behavior of parents of children with precocious heart disease has a significant impact on the formation and development of the child’s personality. Overprotection and protection tend to reduce and frustrate the child’s self-occupation, thus increasing the sense of fear. Coddled children become overly dependent on their parents due to their childishness, have low social adaptability, and may even develop regressive behaviors. Therefore, psychological rehabilitation should be emphasized along with the physical rehabilitation after surgical correction. After the surgery, in the state of stable condition and satisfactory cardiac function, the child’s activity should be gradually increased and the range of activities should be increased, so that the child can have more contact with children of the same age and establish normal interpersonal relationships through play to eliminate loneliness, and parents should use more encouragement in education, so that the child can do more things within his ability to improve his independent living ability and social adaptability, and change the previous spoiled behavior of doing everything, so that Parents of children with precocious heart disease should seize the opportunity to shape their children after surgical correction, and promote the transition of the child’s character from the formation period to the maturity period with good environmental factors and correct educational methods. To care for children with precardiac disease, first of all, we should strictly prevent them from catching colds and respiratory infections, so as not to aggravate their condition. At the same time, they should be urged to rest, not to be overly active, and to go to the hospital for regular review of their condition. For children with surgically treated precardiac disease, care should be strengthened within 3 months after surgery. Pay attention to diet and nutrition; keep warm and prevent from catching cold. Reassure and encourage the child, and make fun of him/her to prevent him/her from carrying the burden of thought; at the same time, pay attention to the sleep and rest of the child, so that he/she can successfully pass the post-operative recovery period.