At the age of 15, the height of 170cm, the main epiphysis has not closed, there is still a possibility of growing taller. The growth of height is related to genetics, gender, nutrition, sleep, exercise and other factors, which need to be specifically analyzed. Thirteen to eighteen years old is the second rapid height growth stage of growth and development, epiphysis has not closed, there is still a possibility of growing taller. In the process of growth and development, there are many factors that affect height: 1. Heredity: it is one of the main factors affecting height, half of the genes in children come from the father and half from the mother, so it is generally possible to predict the height of children based on the height of the father and mother. Son’s adult height (cm) = (father’s height + mother’s height) × 1.08/2, daughter’s adult height (cm) = (father’s height × 0.923 + mother’s height) / 2. 2. Gender: the annual height growth of adolescent boys is greater than that of girls, and the final height of boys is generally higher than that of girls. 3. Nutrition: Nutrition is essential in a child’s growth and development, especially calcium and vitamin D. These two nutrients are essential elements in bone development. 4. Sleep: during sleep, the body will secrete growth hormone, which is conducive to promoting the growth and development of the body. Puberty is especially important for children’s height development, so puberty should strengthen the nutrition, eat more protein-rich, vitamin-rich foods, such as: eggs, lean meat, fish, milk, etc., but also to maintain adequate sleep and appropriate amount of exercise. If the patient’s growth stagnation should be timely medical treatment, under the guidance of the doctor to identify the causes of active treatment.