The height of a 13-year-old boy is short, if it is genetic factors, the general possibility of change is not large, if non-genetic factors, you can improve from the appropriate amount of exercise, balanced nutrition, adequate sleep, etc., if necessary, timely medical treatment. Children’s height and genetic factors have a direct relationship, if the parents are not very tall, children’s height is short, this is a normal phenomenon, the possibility of change in the later stage is unlikely. If the influence of non-height factors, parents can promote the secretion of children’s growth hormone through moderate exercise, such as running, basketball, jumping rope, etc., and need to supplement nutrition, especially calcium and protein-rich food, can promote children’s bone and muscle growth, such as eating more fish, soy products, dairy products and so on. In addition to ensure that children get enough sleep, the brain will secrete a growth hormone during sleep, which can promote children’s musculoskeletal and connective tissue growth, which is conducive to the development of height. 13-year-old boy short height, it is recommended to seek timely medical attention, exclude pathological factors, and actively intervene if necessary.