A 5-month-old baby’s head shape is flat and can be improved by adjusting the child’s sleeping position. The baby’s head shape is mainly caused by the baby’s incorrect sleeping posture. 5-month-old baby’s head cartilage is relatively soft, usually can correct the child’s head shape. It is recommended that when the baby sleeps, the mother adjusts the sleeping position for the baby more, in order to take turns to sleep on the side, the left side, the right side, or the side, exchange the side lying position, flat lying position to improve the shape of the child’s head. Therefore, the 5-month-old baby head shape sleep flat, to prevent the baby to keep a position for a long time to sleep, can also be through the use of corrective pillows. However, it is important to make corrections as early as possible so that it is not more difficult to correct the bones once they have formed.