A two and a half year old child who can’t speak may be related to delayed speech development, abnormal tongue tie development, hearing impairment, mental retardation and other factors, which can be treated by language training, medication, surgery and other aspects. 1. If the child has delayed speech development and still can’t speak at the age of two and a half, parents can induce the child to speak through language training. 2. If the child has abnormal tongue tie development, which affects his/her speech, he/she can go for tongue tie cutting surgery. 3. If the child has a hearing impairment, he or she should wear a hearing aid or have a cochlear implant through surgery under the guidance of a professional doctor. 4. If your child has mental retardation, you can go to a regular hospital to do a cranial magnetic resonance examination to determine whether there are brain developmental abnormalities, and give your child nerve-nutritional drugs, such as vitamin B1, vitamin B12, etc., according to the doctor’s instructions. Usually you can guide the child to speak and exercise the child’s ability to speak. If the two and a half year old child does not speak, it is recommended to go to the regular hospital as soon as possible to check, clarify the cause, and take the appropriate treatment program.