Babies do not sleep through the night may be sleep reversal, too excited before bedtime, calcium deficiency and other reasons, can be improved by reducing daytime sleep, avoiding high-intensity exercise before bedtime, calcium supplementation and other ways. 1. Sleep reversal: It is common for babies to experience sleep reversal, which is often related to improper work and rest of parents and insecurity of babies. It is recommended to hold the child less during the day, keep a brighter environment, reduce the child’s sleep time, so as to improve the baby does not sleep the whole night. 2. Too much excitement before bedtime: babies may have performed high-intensity sports and intense activities before bedtime, resulting in excessive excitement and tension, making it difficult to fall asleep. The baby should avoid high-intensity sports and intense activities one hour before going to sleep, which can effectively alleviate the baby does not sleep through the night. 3. Calcium deficiency: when a baby is deficient in calcium, the blood calcium will drop, which will cause the brain and nerves to be excited, resulting in the baby waking up in the middle of the night and sleeping unsteadily. You can relieve your baby’s sleeplessness by giving him calcium supplements such as calcium gluconate tablets and vitamin D. If your baby often sleeps poorly and doesn’t sleep through the night, you may need to give him calcium supplements. If your baby often sleeps poorly and does not sleep through the night, parents are advised to take your baby to the pediatrician of the hospital in a timely manner to clarify the cause of the disease and treat it under the guidance of the doctor, and not to use medication on their own.