Abstract: Objective: To evaluate the value of color Dopple ultrasound in predicting neonatal hypoxia,and choose the most valuable blood flow hemodynamics for clinical work.Methods: Total of 92 pregnant women with gestion age 32-42 weeks were divided into two groups:60 cases were normal and 32 cases with hypoxia were diagnosed by clinical manifestation.All of them were examined by prenatal color Dopple ultrasound.The hemodynamics parameters,included Vs(systolic peak velocity),Vd(end diastolic velocity),Vs/Vd,PI(pulsatility index) and RI(resistance index) of fetal UmA(umbilical artey),MCA(middle cerebral artery) and RA(renal artery) were measured,recorded all outcomes and compared with neophew.Results: There were significant differences in several hemodynamics parameters of MCA,UMA,RA between normal group and hypoxia group,especially in RI(P<0.01) in RA,Vs/Vd(P<0.01) in UmA and MCA PI/RA PI(P<0.01).Conclusions: RA RI combined with UMA Vs/Vd and MCA PI/RA PI were valuable to predict fetal hypoxia.