Many factors can affect the baby’s length, different treatment should be taken according to different situations. First, whether the baby has insufficient or unreasonable nutritional intake, ensure adequate daily supplementation of high quality protein, and pay attention to a reasonable diet structure. Second, pay attention to whether there is discrimination and abuse of the child, whether there are adverse factors in the environment that affect the baby’s mental psychology, such as the above situation, to improve in a timely manner. Third, to actively physical exercise, outdoor activities in the sun, conducive to the growth and development of bones. Fourth, the presence of chronic diseases, such as prolonged diarrhea, malnutrition, anemia, etc., to be treated accordingly according to the cause of the disease. Fifth, growth hormone deficiency. The baby’s length is lower than two standard deviations, it is necessary to go to the hospital for growth hormone, bone age film and other related examinations in time, and apply growth hormone treatment if necessary.