A two-year-old and four-month-old baby who still can’t talk may be due to cerebral palsy, autism, congenital deafness and other pathologic factors, and the cause should be identified and appropriate treatment measures should be taken. 1. Cerebral palsy: It is due to the damage to the brain function before or after the child’s birth. This type of children may have mobility disorders and may be accompanied by speech and mental retardation. If diagnosed, rehabilitation training should be conducted as early as possible. 2. Autism: Children with autism usually have speech and communication disorders, which may be characterized by a lack of speech. If the child is diagnosed with autism, educational intervention should be conducted as early as possible to enhance the child’s ability to survive. 3. Congenital deafness: Due to hearing impairment, the child’s speech development will also be limited. For those who are clearly diagnosed, the child’s language development can be promoted by wearing hearing aids and other measures under the guidance of a doctor. It is not normal for a two-year-old and four-month-old baby to still not be able to speak, and the child should be taken to the pediatrician of the hospital in a timely manner; after the cause is identified, reasonable treatment measures will be taken under the guidance of the doctor.