2 years old 7 months children will not talk may be due to autism or lack of communication, etc., can be treated through rehabilitation exercises, more communication and other methods. 1. autism. 2 year old 7 month old child can’t talk may suffer from autism, it is a kind of generalized developmental disorder, starting in infants and young children, mainly manifested in different degrees of speech developmental disorders, interpersonal communication disorders, as well as narrow interest and behavioral stereotypes, can be assessed by the autism assessment test to help diagnosis, diagnosis should be given to the corresponding rehabilitation, behavioral exercise. 2. Lack of communication. If a child over 2 years old still can’t speak, it may also be due to the parents and the child’s parent-child communication time is too short, the language training is not enough, the child’s exposure to the language environment is relatively small and lead to. Usually parents should communicate with their children more, give more care and love to their children, which is helpful to the child’s language development. Attention to 2 years 7 months child can not speak to timely medical treatment, clear cause, so as not to cause irreparable damage to the child.