Six-month-old babies sleep about 15 to 16 hours a day is more normal, due to individual differences, so the specific length of time can not be generalized. 6 months of the baby’s various bodily functions are still in development, so we should ensure adequate sleep hours, can help the baby’s mental as well as neurological development, it is recommended that 6 months of the baby’s daily sleep should be more than 13 hours, it is recommended that 15 to 16 hours is more normal. Most of the baby’s nerve cells, various synapses, and protein synthesis are completed during sleep, so if the baby does not get enough sleep, growth and development may be limited to a certain extent, and it is recommended that the baby should develop good sleeping habits and not stay up late. Parents should closely observe the development of their babies and should also go to the hospital in time if there are other signs of discomfort.