It is not clear how tall a 15-year-old boy 165cm can grow, the epiphysis is not closed can continue to grow taller, should pay attention to dietary care, appropriate exercise and so on. The average height of a normal 15-year-old boy is about 170cm, and some 15-year-old boys are about 180cm. Therefore, 15-year-old boys 165cm can still grow how high is not clear, need to be combined with the parents’ height, nutritional status, personal health, epiphyseal status and other factors to determine the comprehensive. If the parents are short, nutritional status is poor, physical weakness, etc., height growth space is small. However, for some of the parents who are tall, have good nutritional status, strong physique and whose epiphyses have not yet closed, there is some room for height growth. For 15-year-old boys with a height of 165cm, intake of nutritious food and appropriate exercise can be used to promote height growth. It is recommended that 15-year-old boys with a height of 165cm adjust their mentality, strengthen their nutrition, engage in more outdoor activities and physical exercise, and ensure daily sun exposure to stimulate the potential for height growth.