Baby sleeping on his back has benefits and disadvantages, it is recommended to sleep on his back under the supervision of parents is safer, the specific analysis is as follows. 1. Benefits: the baby in the fetal period posture most of the posture to lie down mainly, so life on the stomach so that the baby has a certain sense of security, is conducive to the baby’s sleep, the baby’s brain development has a certain role in promoting. 2. The bad side: the baby’s age is relatively small, so in the case of unattended, sleeping on the stomach is very easy to make the surrounding pillows, quilts blocking the position of the nose and mouth, suffocation occurs. Babies can properly sleep on their stomachs, but need to be under the supervision of parents to avoid affecting the baby’s normal breathing, suffocation.