Whether a boy can still grow taller at the age of 17 mainly depends on whether the epiphysis is closed or not. It is recommended to consult an orthopedic surgeon and take an X-ray of the knee joint, if the epiphysis is not closed, the possibility of growing taller is still very high. Generally speaking, 17-year-old boys can grow taller, and the length of development time is different for each person. If the epiphysis is not completely closed, it indicates that there is still room for growth, but if the epiphysis has been completely closed, the bones of the lower limbs will stop growing, and the body will not grow taller, so it is recommended to take a picture and have it diagnosed by a professional doctor. If the epiphysis is not completely closed, if you can grow taller, you can assist some other ways to help your body grow taller through appropriate exercise, such as jumping rope, jumping high, and so on. In the diet also need to supplement some high calcium content of food, such as milk and eggs, moderate vitamin supplement, more sunshine, help calcium absorption. It is also necessary to ensure sufficient sleep, which is conducive to the secretion of growth hormone, and 17-year-old boys are recommended to ensure more than 8 hours of sleep every day.