Scissor gait of the lower limbs is a clinical manifestation of spastic bilateral lower limb paralysis in cerebral palsy. The scissor gait is due to the increased muscle tone of both lower limbs, especially the increased tension in the extensor muscles, which causes the lower limbs to be over-extended and the legs to cross in a scissor shape when moving. How to effectively prevent scissor gait of lower limbs? For dynamic myospasm, intramuscular tendon cut or myofascial cut is used; for static myospasm, tendon sliding extension is performed and the anterior tibial tendon is split and displaced in the lateral 1/2. Then orthopedic fixation with homemade external fixator, keep the knee joint straight, both ankles and feet in neutral position, both lower limbs abducted 30°, after 6 weeks remove the external fixation rehabilitation training. 1, first of all, before the child is born: (1) Pregnant women should actively conduct early prenatal checkups and do perinatal health care to prevent congenital diseases in the fetus. (2) Should abstain from bad habits, such as smoking, drinking alcohol, not abusing narcotics, sedatives and other drugs. (3) Prevent viral infections such as influenza and rubella, and do not come into contact with cats and dogs. (4) Avoid contact with harmful and toxic substances such as radiation and frequent ultrasound examinations. (2) When the fetus is born, i.e. during delivery. Fetal asphyxia and intracranial hemorrhage caused by delivery is an important cause of pediatric cerebral palsy. Preterm delivery and obstructed labor should be prevented. Medical personnel should carefully and meticulously handle all aspects of delivery and do all the treatments for difficult fetuses. 3.The fetus should be given better care and reasonable feeding within one month after birth, and intracranial infection and traumatic brain injury should be prevented. 4.Pregnant women with the following conditions should have prenatal checkups as early as possible: (1) Older pregnant women (over 35 years old) or men over 50 years old. (2) Marriage between close relatives. (3) History of unexplained miscarriage, premature birth, stillbirth and neonatal death. (4) Pregnant women with mental retardation or both close relatives have a history of epilepsy, cerebral palsy and other genetic diseases. If fetal abnormalities are detected early in pregnancy, the pregnancy should be terminated as soon as possible.