How long a 9-month preterm baby stays in the incubator is based on the baby’s gestational age, weight and birth situation, and cannot be generalized. Each premature baby’s weight, gestational age and birth situation are different, so the time to live in the incubator is also different, mainly based on the baby’s physical development, health, and the birth of the baby’s situation to a comprehensive assessment. Premature resistance is relatively poor, easy to easily lead to the invasion of germs, for this type of premature babies need to pay attention to timely treatment, live in the incubator time depends on the baby’s recovery to comprehensive judgment. For preterm babies should pay attention to do a good job of physical examination, if there are abnormalities to timely treatment, can be under the guidance of professional doctors to rescue.