Three-year-old babies can’t speak either because of delayed development of the language system or because of hearing and intelligence problems, so we should pay attention to the timely improvement of hearing and intelligence checkups as well as language training. Generally speaking, normal children at the age of three already have a certain ability to speak, after two years of age and still can not pronounce and no signs of speech parents need to pay special attention to, this may be the individual existence of the development of the language system retardation factors. This may be due to a delay in the development of the individual’s language system. This requires more stimulation of the language environment and patience to encourage the child to interact with familiar people. There is also a high probability of congenital structural dysfunction of the hearing system, which requires timely medical treatment with endoscopy and imaging tests, and early cochlear implantation or wearing of hearing aids; and there is also a possibility of mental retardation resulting in the child’s inability to speak, which requires timely intellectual examination for early intervention. It is recommended that children over the upper limit of normal age who have not yet spoken should consult a doctor in time to identify the cause of the problem and to provide targeted treatment or intervention.