Whether the baby sleep cradle on the brain, need to be based on the strength of the rocking decision, if the strength is small, generally will not cause adverse effects on the baby’s brain, on the contrary, the strength is too large may lead to the baby’s brain damage. Cradle is more commonly used sleep tools for infants, the baby has a certain soothing as well as soothing effect, but also can reduce the baby’s dependence on parents, but need to pay attention to the strength of the rocking should not be too large, otherwise it may lead to the baby’s brain to follow the vibration, affecting the development of the brain. So appropriate rocking can play a soothing effect, but it is not recommended to let the baby sleep for a long time cradle, to avoid spinal deformation.