Pronunciation change is a pathological symptom of dysphonia, mainly manifested as delayed and abnormal pronunciation, the development speed of pronunciation is lower than the corresponding age before leveling, unclear speech or mispronunciation. The following is a brief introduction for big sisters on how to prevent it scientifically. It is important to note that vocal rest should be moderate. If the nature of the lesion is ignored to rest uniformly until the lesion disappears completely, then the laryngeal muscle will become wasted due to disuse and further cause other voice problems. In the case of wrong vocal method, voice correction is to train the patient according to the physiological principles of normal vocalization, so that the laryngeal function of vocalization can be restored to normal. Commonly used methods include auditory training to help patients establish the correct concept of voice; muscle relaxation training, including chewing therapy, yawning and sighing exercises to relax the internal and external muscles of the larynx; breathing training, training abdominal breathing, combined thoraco-abdominal breathing, dog panting to release the tension in the neck when exhaling and vocalizing; voice initiation exercises, soft voice initiation to adjust the vocal fold closure, and hard voice initiation to adjust the poor closure; on the basis of the above On the basis of the above, “pharyngeal” exercises can further strengthen the voice (singing and speaking voice) in about 3000Hz high-frequency overtones, improve the sound quality, strengthen the sound penetration, and training vocal function, so that it is not easy to fatigue.