There are many reasons that affect children with slurred speech, and we can consider them from three aspects: First, there are abnormalities in the central nervous system that governs language, such as intellectual developmental disorders, cerebrovascular accidents (stroke, etc.), and intracranial lesions. These lesions are often accompanied by other symptoms in addition to slurred speech, which is extremely rare in children. And parents can exclude it by themselves. Secondly, from the consideration of the tissues and organs through which the airflow passes during pronunciation, such as vocal cord edema, polyps causing hoarse and unclear voice, such as oropharynx, tongue root mass, incomplete palatopharyngeal closure, cleft palate, tongue body disease, tongue-lip tether abnormalities and dental factors can cause slurred speech. Third, and this is the most common cause, hearing impairment leads to slurred speech. More parents may say that there is no problem with their child’s hearing, and he can hear the usual very small sounds. Yes for severe hearing impairment, parents can usually find, but we are talking about hearing impairment is not necessarily every frequency can not hear, or hear but can not hear clearly. Clinical analysis shows that hearing impairment is the most common cause of slurred speech. Therefore, once there is a problem with slurred speech, parents should visit the hospital promptly and not simply think it is a big tongue and miss the best speech development period. The condition can be improved through speech rehabilitation.