Babies with cerebral palsy can smile, just less and less naturally. Cerebral palsy affects babies mainly by limb movement disorders, postural abnormalities, and in severe cases, intellectual disabilities. However, the movement of facial expression muscles is not much affected, and it is a natural reaction of human beings to smile. Babies with cerebral palsy may still make smile when they are stimulated by the outside world, only that their smile is not as natural as that of normal children. However, babies with severe cerebral palsy may have severe intellectual disability or mental abnormality, and they may not be able to understand or may be too indifferent to external stimuli that may cause them to laugh, so they may seldom laugh. However, to determine whether a baby has cerebral palsy, it does not depend on whether he can smile or not, but whether there are obvious elevated muscle tone, motor disorder, abnormal postures, and whether the sitting, standing, walking, talking and intellectual development are in line with the baby’s age. If parents do not know how to judge, they can go to the hospital and be diagnosed by a doctor.