As a general rule, growth and development stops two years later in boys than in girls. As far as the general level is concerned, the time of growth and development for boys is from 0 to 18 years old. However, due to individual differences, some children will stop growing two years earlier, some children will stop growing two years later, and they can even reach the age of 20 and still growing. So for boys in the 0-20 years of age this period do not give up this kind of taller various efforts, because it is possible to grow taller. During this period, we should first pay attention to nutrition, balanced and sufficient intake, ensure good sleep, as well as adhere to physical exercise. All of these measures will help the growth of bone mass and the development of the boy’s height. In addition, it is emphasized that some boys will still be mildly taller at the age of 20, but it will not be very obvious.