The mild dysarthria only shows inaccurate or unclear pronunciation, and the speech can be understood; the severe dysarthria is difficult to be understood because of the pronunciation errors. Experts point out that dysarthria is a symptom that seriously affects patients’ daily communication, and patients need to go to a regular hospital for diagnosis and treatment as soon as possible so as to cure it as soon as possible. Classification and diagnosis of dysphonia: 1, functional dysphonia: the clinical manifestations are mainly vocal muteness or even loss of voice, unstable sound quality change, foreign body sensation in the throat, self-conscious laryngeal fatigue when vocalizing, physical manifestation of facial vocal expression of excessive force, squeezing vocalization and accompanied by expansion of neck blood vessels, muscle bulge, etc. Laryngoscopic examination shows normal or dark red congested mucosa of the vocal folds, poor closure of the vocal folds during vocalization, and compensatory inversion of the vocal folds, which can obscure the vocal folds in severe cases and affect the observation of the vocal folds. In severe cases, the vocal folds can be obscured, affecting the observation of the vocal folds. Spasmodic dysphonia: The clinical characteristics of spasmodic dysphonia are abnormal muscle tone of the larynx only when speaking and vocalizing, but no obvious effect in other vocal actions such as singing, laughing and coughing. Patients show vocal tension, tremor, low voice, and voice will abnormally interrupt vocalization. In severe cases, intermittent vocal loss and breath-like sounds may occur. It may be accompanied by tension in the neck muscles and jugular vein anger. On laryngoscopy, the laryngeal vestibule is spasmodic, the anterior and posterior diameters are reduced, the vocal folds are normal in shape and color, and the motion is irregular, with excessive closure and excessive inversion of the ventricular bands. The laryngeal electromyography can be used as a diagnostic aid.