Three-year-old children’s unclear speech may be caused by short tongue tie, poor language environment, hearing impairment, etc. The main treatment is to take surgical treatment, improve the language environment or hearing treatment. 1. Short tongue tie: If the child’s tongue tie is short and the tongue cannot extend forward to the outside of the mouth, it will affect the speech and lead to unclear speech, which requires tongue tie correction surgery, and the earlier the surgery, the better the result. 2. Poor language environment: If the child’s parents are not talkative, or there are no other talkative people around, it will affect the child, so he or she must communicate with the child more often, so that the child can imitate talking and promote the child’s language development. 3. Hearing impairment: If the child has a hearing impairment, can not hear well, it may affect the speech, should be timely to the hospital, to identify the causes of hearing impairment, timely treatment, some children may need to wear hearing aids or cochlear implants. Three-year-old children can not speak clearly, parents should take their children to the hospital in time to identify the causes of targeted treatment.