Sleep is a cyclical physiological phenomenon, is an important aspect of human life activities, but also to ensure the growth and development of the body, to promote the growth of “nutritional elements”. As the saying goes; “sleep well, grow taller”, is scientifically based. Sleep is the brain’s temporary rest process, is a protective inhibition, to eliminate brain fatigue, protect brain function, enhance the human body rabbit epidemic function has great benefits. More importantly, sleep has a very close relationship with the growth hormone that promotes the growth of the body. Growth hormone is a physiologically active substance secreted by the anterior pituitary gland, which can act directly on the tissue cells of the whole body, promote protein synthesis in the tissues, increase the volume and number of cells, and promote the growth of the body. It can also promote the proliferation of epiphyseal cartilage cells of long bones, accelerate the growth of bone and cartilage, and make the human body gradually increase in height. Modern research has found that the secretion of growth hormone occurs when infants are asleep on the first day of life. Under normal circumstances, the secretion of growth hormone at night is three times higher than that during the day. The secretion and release of growth hormone is related to the slow wave of sleep. Generally, the secretion of growth hormone begins 45 to 90 minutes after sleep and reaches its peak at 70 minutes after sleep on average. If the sleep time is delayed, the release of growth hormone will be delayed, and the secretion of growth hormone will not start until the person is asleep. If you do not sleep at night, very little growth hormone is secreted. Growth hormone secretion varies among infants, children, adolescents, adults and the elderly. In infants, the level of growth hormone in the blood is high 24 hours a day, and there is no significant difference between sleeping and waking. In young children, growth hormone is secreted only during sleep at night, and basically not when they are awake, with a basal level of 91 micrograms per day. 8-15 year old adolescents, although they also secrete growth hormone when they are awake, the amount is very small, and it is mainly secreted when they are asleep, but the amount of growth hormone secreted during deep sleep increases dramatically, up to 690 micrograms per day, which is 7.5 times of that of the early childhood period. In young people and adults, growth hormone is mainly secreted at night, and the amount secreted during the day is very small, sometimes not measurable, and is mostly secreted during daytime dozing. In the elderly, growth hormone is also secreted during sleep, with little or no peaks, and even less during the day. In adolescents, the secretion of other hormones at night is also very strong. For example, prolactin, sex hormones, luteinizing hormone and other hormones are very beneficial to growth and development. During sleep, the epiphyseal cartilages of the spine, legs and joints are all in a relaxed state, free from the pressure of the body and the influence of gravity, and can be freely stretched. Therefore, when you get up in the morning, your height is 0.5-1.5 centimeters higher than at night, so sleep is good for bone development. In order to the normal growth and development of children, in order to increase height, first of all should ensure that children have enough sleep time, the younger the child, the longer the sleep time. Under normal circumstances, newborns sleep 18-22 hours a day; children under the age of 1, should sleep 14-18 hours a day; 1-2-year-old children, should sleep 13-14 hours a day; 2-4-year-old children, should sleep 12 hours a day; 4-7-year-old children, should sleep ll hours a day; 7-15-year-old children, should sleep 10 hours a day; 15-20-year-old adolescents, should sleep 9-10 hours a day. 10 hours of sleep per day. Sleep not only depends on the length of time, should also pay attention to the quality. Teenagers drive all night, stay up all night will affect the quality of sleep; children eat food before bedtime, parents sleep with, sleep too soft bed, will affect the quality of sleep, should develop good sleep habits. Adolescents are growing in size, the golden period of physical growth, should pay more attention to sleep.