It is better for children to go to sleep before ten o’clock in the evening, if children go to sleep after ten o’clock in the evening, it will result in too short a sleep time, after too short a sleep time, the next day’s state of mind will be poorer, which will affect the next day’s study and play and other situations. After ten o’clock, children’s growth hormone secretion is more vigorous, if children miss the growth hormone sleep peak, it will cause the growth of development is too slow, thus affecting the height of children. If there is no special thing, parents try to ensure that children before ten o’clock in the evening to go to sleep is better, for children’s physical and mental health are favorable.