It is considered abnormal for a two-year-old baby to not be able to speak. It may be due to congenital deafness, cerebral palsy, autism and other diseases, and you should bring your child to the pediatrician of the hospital in time. 1. Congenital deafness: the child has a hearing impairment at birth or shortly after birth. Hearing impairment affects the child’s speech development. For those diagnosed with congenital deafness, hearing aids may be considered to promote the baby’s language development. 2. Cerebral Palsy: It is a syndrome of non-progressive brain damage due to a variety of causes before or within the first month of life. Most of the children will have limb movement disorders, often accompanied by mental retardation and speech disorders. Rehabilitation should be carried out as soon as possible to ensure that the child recovers as much as possible. 3. Autism: also known as autism. The child will have different degrees of social interaction disorders and language disorders. Those diagnosed with autism should be treated with intervention training as early as possible under the guidance of a doctor. Two-year-old babies can not speak should be brought to the hospital pediatrics in a timely manner to identify the cause, under the guidance of the doctor to take reasonable treatment plan.