Newborn babies sleeping on adults, if the number of times is relatively small, there is no great impact on the body. If you sleep on adults for a long time, the development of the child’s body is also unfavorable. Because the child’s skeletal development is not fully mature, long-term sleep on adults, the development of the child’s spine is not good. It is recommended to lie flat on the crib to sleep, the development of the bones are good. In addition, do not let the child maintain a certain position for a long time, pay attention to change a position, such as let the baby lie on his side or lie flat, etc., to avoid the situation of head deformity. If the head appears to change because of the sleeping position, it is difficult to correct. Also pay attention to vitamin D and calcium supplements to promote calcium absorption.