Infants sleep soft and hard suitable bed can be, not too soft or too hard. Infant’s bed if too hard, easy to make local skin or tissue compression, the baby’s skin is more delicate, compression for a long time, may cause local damage, may also affect the baby’s sleep environment. The child’s body development has not yet formed, it is easy to change the shape of the body due to the bed is too soft, squeezed to the chest or abdomen, affecting the lungs, abdomen and other organs of the function, resulting in fatigue and discomfort of the baby’s sleep process, affecting the quality of sleep, long time to sleep in too soft beds, may affect the baby’s physical development. Therefore, give the child’s bed soft and hard can be appropriate to the child lying down when the bed slightly deformed, will not cause the child’s body deep, also will not cause local tissue pressure, so as not to cause injury.