Eleven-year-old children can not sleep at night to consider the environmental factors, too much pressure to study and neurasthenia and other factors, as follows: 1. Environmental factors: sleeping environment is too cold, too hot, or too noisy, are not conducive to sleep, resulting in the case of sleepless nights. 2. Learning too much pressure: 11 years old facing junior high school, learning too much pressure, will cause excessive mental stress, writing homework at night until late, thus affecting the child’s sleep quality. Therefore, it is necessary to regulate the time of study and rest, to ensure a good night’s sleep, in order to improve the quality of learning. Usually combine work and rest, avoid excessive use of the eyes and brain, appropriate to strengthen the movement, eat some high protein and vitamin foods. 3. Neurasthenia: long-term tension and stress, there will be mental easily excited and brain easily fatigued, often accompanied by emotional troubles, irritability, sleep disorders, muscle tension pain and other symptoms. It should be reminded that eleven-year-old children can not sleep at night for more complex reasons, it is recommended to go to the hospital in a timely manner to check the cause of the disease to give targeted treatment.