The voice does not rise, vocal leakage, singing out of tune, speech can not last, more language is hoarse; examination can be seen in the voice time shortening, narrow range, vocal cord bilateral retraction weakness, incomplete closure, is the laryngeal muscle weakness. It is mostly seen in people with old age, kidney failure and overworked voice, and is mostly caused by lack of vital energy and strain on the laryngeal muscle, unlike myasthenia gravis or neuropathetic diseases. Vocal fold closure insufficiency is a disease of vocal fold closure caused by laryngeal muscle weakness and vocal fatigue. It is caused by the strain of the laryngeal articulatory muscles, especially the arytenoids, due to excessive use of voice. If the high voice is forced for a long time, it will increase the activity of the laryngeal muscles and cause vocal fatigue, as well as the elderly who are frail. Vocal fold closure insufficiency is the disease of vocal muscle weakness that leads to insufficient movement of the vocal folds, as well as laryngeal muscle weakness and vocal fatigue. Both can lead to the development of this disease. Indirect laryngoscopy and fiberoptic laryngoscopy reveal bilateral hypermobility of the vocal folds, hypotonia of the vocal folds, and a pyknotic cleft on closure. Vocal fold closure insufficiency is a disease in which laryngeal muscle weakness causes hypermobility of the vocal folds during vocalization, and also laryngeal muscle weakness and vocal fatigue.