The etiology of stuttering is not clear, but may be closely related to biological, psychological and social factors, mainly the following: 1. Genetic factors, stuttering has a very obvious family aggregation phenomenon, with a relatively high prevalence among first-degree relatives, and studies have found that the prevalence of stuttering in identical twins is higher than that in dizygotic twins. 2. Organic brain factors, especially perinatal brain damage, prenatal, perinatal or postnatal physical and chemical damage, are also major causes of stuttering. 3. The main cause of stuttering is physical and chemical damage. 3. damage to the articulatory organs, some stuttering may be related to abnormalities in the articulatory organs, such as abnormalities in the function of the respiratory muscles and the organs of the pharynx, which can also lead to stuttering in children. 4. psychosocial factors, if there are friends or relatives who stutter in the child’s living environment, the child may form the habit of stuttering because he or she likes to imitate. Family education is too strict, in the process of children’s language development, parents give too much criticism and pressure, resulting in the child’s expression of the pause, also will appear stuttering and other problems. Psychological factors also contribute to the occurrence of stuttering. Some children stutter only after acute stress disorder, or chronic trauma.