The duration of incubator stay for 34-week preterm infants is related to their recovery, weight gain, milk intake, room temperature of the neonatal room, etc. It usually takes 2-4 weeks. The criteria for a premature baby to leave the incubator is that the newborn can maintain a constant body temperature of 36.5-37.2℃ at room temperature, weigh more than 2kg, suckle, sleep, urinate and defecate normally. 34-week premature babies with a birth weight of 1.7-1.8kg mostly need about 10 days to recover to their birth weight, and when the weight reaches 2kg they can be considered to leave the incubator, which usually takes 2-4 weeks, and the room temperature should also be considered. If the temperature of the newborn room is low, it is more appropriate to get out of the incubator when the weight of the newborn needs to reach greater, to avoid low temperature leading to hard swelling or cold, etc. The newborn may need to continue to be hospitalized in the NICU for a period of time after being released from the incubator, as early or late complications may occur in preterm infants.