The baby is one and a half years old and still can not speak may be tongue tie is too short, speech center development delay and hearing impairment and other causes, parents should take the baby to the hospital under the guidance of the doctor through surgery, language rehabilitation training, oral medication and installation of cochlear implants and other methods of treatment. 1. Short tongue tie: short tongue tie can also lead to one year and eight months old babies can not speak, parents can take the baby to the hospital to check the tongue tie, if the baby’s tongue can not be stretched out of the oral cavity, then need to do tongue tie amputation. 2. Delayed development of the language center: If the baby can understand adult speech, it means that the baby’s IQ development is normal. Parents should communicate with the child diligently, more exchanges, repeated emphasis to promote the understanding of the child. At the same time, follow the doctor’s instructions to give the baby oral glutamine or vitamin B1 and other drugs for treatment. 3. Hearing disorders: when there are hearing abnormalities, can not normally receive sound signals, and thus can not speak normally, parents should promptly take the baby to the regular hospital for hearing diagnosis, to give the necessary treatment, such as the configuration of cochlear implants and so on. It is recommended that the baby is 1 and a half years old and still can not speak after the emergence of the situation, can cooperate with the doctor to clarify the cause, and then do targeted treatment and treatment.