Vocal fold closure insufficiency means that the bilateral vocal folds are not completely closed when pronouncing, and there are gaps, which can cause hoarseness in the patient’s voice. The causes of vocal fold closure insufficiency are as follows: 1. Vocal fold edema caused by chronic laryngitis, chronic laryngitis is due to prolonged inappropriate use of sound, after strain caused by bilateral vocal fold diffuse congestion, edema. In the treatment of chronic laryngitis, it needs to be treated with voice ban. The laryngitis is caused by abnormal neoplasm of the vocal cords, such as vocal cord nodules, vocal cord polyps or malignant tumors of the vocal cords. The surface of the vocal cords can be seen to be abnormally neoplastic when examined, which can lead to hoarseness caused by incomplete closure of the vocal cords bilaterally. In this case, laryngoscopic laryngeal mass removal is needed to cure the problem. 3, due to compression or injury of the laryngeal nerve, resulting in abnormal nerve movement, causing vocal fold closure. In this case, it is usually seen in vocal fold paralysis, and the cause is often due to neck trauma, goiter or lung tumor, mediastinal tumor compression of the vagus nerve, which leads to vocal fold paralysis. Patients need to go to the hospital for detailed examination of thyroid ultrasound, lung CT and laryngoscopy to get a clear diagnosis, find the original cause and carry out relevant treatment to cure.