Elementary school students should not sleep less than 10 hours a day. Elementary school students are like the 8 o’clock sun, is a critical period of growth and development, the secretion of growth hormone time is mainly at night, especially at night 11:00 to 3:00, which should ensure that elementary school students sleep at night time, usually 9:00 p.m. to 7:00 a.m.. Adequate sleep is not only advantageous for growth and development, but also a guarantee of the children’s energy for the day, sleep well at night, in order to be energetic during the day, to ensure the quality of learning. If there is a lunch break at noon, it is best to sleep for half an hour to one hour, which is more conducive to good health. In short, to ensure that children’s sleep time, not only on the physical development of the benefits of physical and mental health also has great benefits.