Boys’ voice change period is generally between the ages of 10 and 20, and the length of the period varies according to the individual’s physical condition. Boys voice change refers to the voice from a child’s voice into an adult voice change process, voice change generally from the age of 10 years old, men 13 ~ 16 years old for the middle of the voice change, 17 ~ 20 years old for the late voice change, the specific length of time need to be due to the individual’s physical condition. Vocal change occurs due to the hormones secreted during puberty will make the larynx sound dull and hoarse, unstable treble, after the period of vocal change will make the male voice into a low and thick male voice, the female voice change is less obvious, after the change of the bass region sound more full-bodied. Boys should pay attention to protect their voices, avoid shouting, fully understand their physiological changes, and avoid unhealthy psychology when they are in the period of voice change.