Etiology: 1, hypoxic asphyxia: including fetal hypoxic asphyxia in the mother’s womb, neonatal hypoxic asphyxia during delivery, respiratory distress syndrome, peripheral circulation failure, erythrocytosis. 2, brain injury: such as infant brain injury during delivery, neonatal cranial injury or brain infection, cerebrovascular accident. 3.Premature birth and fetal dysplasia: intrauterine infection, slow intrauterine growth, congenital malformation. The possibility of cerebral palsy increases greatly when the weight of the newborn is less than 2500 grams (about 40% of children with cerebral palsy weigh less than 2500 grams). 4. Certain genetic diseases and neonatal nuclear jaundice. 5. Causes in pregnant women: including abdominal trauma in pregnant women, preeclampsia, prenatal hemorrhage, toxemia of pregnancy and placental causes (placental abruption, placenta praevia, placental necrosis or placental malfunction), as well as certain chronic diseases in pregnant women (hypertension, hepatitis, diabetes, drug addiction, drug overdose, etc.).