The scientific method of growing taller at the age of 20, the prerequisite is that the epiphysis is not completely closed, such as through a reasonable diet, strengthen exercise, ensure sufficient sleep and other ways to promote growth. At the age of 20, most teenagers’ epiphyses have completely closed, and it is impossible to continue to grow taller at this time. However, if the body develops later and the epiphysis is still not completely closed through radiography, there is a certain hope to continue to grow taller. Diet should be reasonable, meat and vegetables, to ensure adequate nutrition, can be appropriate to increase the intake of high-quality protein. Participate in sports, such as swimming, running, playing soccer, etc. Reasonable exercise can stimulate bone development. Night sleep to go to bed early, to ensure sufficient sleep time, the best time of the day the body grows taller is in the night sleep. If the height is low, you should consult a doctor in time and follow the doctor’s advice.