It is usually not normal for a one and a half year old baby to not be able to point at things. In general, the baby in about 7 to 10 months, vision can see a certain distance, at this time the finger parts will also begin to appear pointing behavior. One and a half year old baby can not point to things, may be related to developmental delay, but also may be autism, brain neurological development abnormalities, etc., parents are advised to take their babies to the hospital in a timely manner to find out the cause of the disease. 1. Developmental delay: it refers to the abnormal phenomenon of children slowing down in the process of growth and development, which is mainly related to genetic, endocrine and other factors. Patients may have abnormal physical, intellectual, behavioral habits and other aspects of the performance. 2. Autism: Autism starts in infancy and early childhood, usually starts slowly before the age of 3, characterized by social interaction and language communication disorders, but also symptoms such as intellectual and cognitive disorders, sensory and motor disorders, which can lead to the phenomenon of one-and-a-half year old babies not being able to point to things. 3. Abnormal development of brain and nerve function: one and a half year old babies can not point to things may be caused by abnormal development of brain and nerve function, common diseases such as cerebral palsy, but also can be accompanied by obvious slow reaction force, muscle tone enhancement and other manifestations. Parents should pay attention to the fact that one and a half year old babies still can’t point to things, and bring their babies to the doctor in time to improve the relevant examinations, such as electroencephalogram, cranial MRI, etc., so as to make clear the development of babies, exclude pathological diseases, and carry out the corresponding treatment if necessary.