The normal value of pediatric heart rate is 40-50 respirations per minute, and the pulse rate is about 120-160 beats per minute, which varies depending on the temperature of the surrounding environment, as well as the effects of exercise, eating, and sleep. After strenuous exercise, the heart rate will be accelerated, in deep sleep, the heart rate will be slow, the heart rate fluctuation of children will be larger, after growing up, the fluctuation will gradually become smaller, children often have irregular breathing, no rhythm, mainly because of the respiratory center of children is not fully developed, and do not need to worry about it too much. When the heart rate rises, the body’s metabolism will be more vigorous, nerve excitability will be high, if the heart rate is still elevated in quiet and deep sleep, it is considered to be the existence of organic heart disease, and it is recommended to go to the regular hospital to determine the condition of the disease, and treat accordingly.