As the saying goes: three turns and six sits, this is a developmental law for newborns, normally the development of children will follow such a law, but for premature babies, because there may be immature development at birth, so after birth it is easy to lead to developmental backwardness, so that some mothers consult, six months premature babies can not turn over how to do? In fact, for mothers, it is important to use corrective months correctly, so that it is fair to measure the development of the baby. If a six-month-old preemie can’t turn over, if it belongs to the corrective age, it is typical of the lagging development of gross motor. Gross motor refers to the body posture and activities controlled by the large muscles of the body, such as: prone lifting, turning over, sitting, crawling, standing, walking, running, etc. Normal children develop gross motor very fast in the first year after birth. The proverb “three turn, six sit, seven roll, eight crawl, ten stand, week-old walk”, basically said the key period of the development of large motor 0-1 year old baby. What if a six-month-old preemie can’t roll over? It is necessary to conduct gross motor training as early as possible. Gross motor training refers to the use of various motor training methods to improve the abnormal posture of the child’s body and the delayed development of gross motor. Treatment should be tailored to the baby’s overall condition, develop a training plan, and train according to the baby’s developmental pattern, combined with functional activities. The treatment should make use of the normalization of the baby’s own reflexes to induce normal movement patterns and postures, and gradually allow the baby to acquire normal motor functions. Gross motor training advocates early detection and early training. Babies can play an effective intervention role in early macromotor training to bring the development of macromotion closer to the normal direction, and the effect is obvious. It can effectively inhibit the baby’s abnormal posture, reduce muscle tone and improve muscle strength. Adhere to the early large motor training can shorten the gap with the development of normal babies, most of the motor development delayed babies can catch up with their peers before the age of 3, and after that can live a normal life.