The baby’s restless sleep in the second half of the night is firstly considered to be related to vitamin D deficiency. It is recommended to give your baby vitamin D and calcium supplements, such as Icosin, pediatric Diclofenac granules, oyster calcium carbonate granules, and calcium lactate granules. In addition, give your child more sunshine to promote calcium absorption. Eat calcium-rich foods, such as fish and shrimp. If the mother is breastfeeding, her diet should be rich in calcium-rich foods, which will also help the baby’s absorption. In addition, it is necessary to see if the baby has other conditions that cause restless sleep, such as abdominal discomfort or having intestinal cramps, which may also occur. It is recommended to go to the hospital and let the doctor check the body to clarify the specific cause, and give oral medication if necessary.