Eight-month-old babies can be made to sleep through the night by adjusting their eating habits, maintaining a suitable room temperature and humidity, and supplementing vitamin D. The details are analyzed as follows: 1. Adjustment of eating habits: baby dinner eat full, so as not to wake up at night due to hunger. But be careful not to eat too much before bedtime, so as not to aggravate the burden on the gastrointestinal tract, or urinate more often at night, affecting sleep. 2. Maintain appropriate indoor temperature and humidity: the room is often ventilated to ensure that the air is fresh, and if necessary, turn on the heater or humidifier, which will help the baby sleep through the night. 3. Supplement vitamin D: if the baby clear vitamin D deficiency, affecting the absorption of calcium, easy to lead to the baby’s increased nervous excitability, the phenomenon of easy to wake up, it is recommended that under the guidance of the doctor to the baby vitamin D supplement. There are many other ways for eight-month-old babies to sleep through the night, specifically consult a professional doctor.