Generally 18 months of the baby, can consciously call parents, say some simple words. 1 year and 5 months baby can not speak but understand everything, may be caused by pathological factors, need to be vigilant about the abnormal development of organs of sound or autism and other diseases, the need to consult a doctor as soon as possible to avoid delay. 1. Abnormal development of organs of articulation: due to the congenital developmental disorders of the baby’s organs of articulation, affecting the baby’s normal articulation function, manifesting the above symptoms. Laryngoscopy can be used to make a clear diagnosis. If necessary, surgery can be performed according to the situation. 2. Autism: Autistic babies can often show some abnormalities at the age of 1 year and 5 months, which can show different degrees of interpersonal communication disorders, narrow interests and stereotyped behaviors and other symptoms. Early intervention is recommended to improve treatment outcome. In addition, some babies lack of language stimulation, can also lead to the baby does not love to talk, parents can usually communicate with the baby more, as soon as possible to take the baby to the hospital to do a detailed examination, as soon as possible to make a clear diagnosis, follow the doctor’s advice to give symptomatic conditioning or treatment.