【】Objective Analysis of prenatal ultrasound diagnosis of different types of placenta praevia in clinical application value.Methods 228 pregnant women of prenatal diagnosis with placenta previa in our hospital from June 2008 to June 2015 were selected as the research objects, according to the results of ultrasonic examination, patients were divided into complete placenta previa group (75 cases), partial placenta previa group (72 cases) and marginal placenta praevia disc group (81 cases) and contrast postpartum placenta previa coincidence rate and clinical characteristics of patients in the three groups and pregnancy outcomes were retrospective analysis.Results Prenatal ultrasound diagnosis of different types of placenta previa and postpartum clinical diagnosis of placenta previa coincidence rate had no statistical significance (P > 0.05), three groups of patients in the mode of delivery, gestational age at delivery, postpartum hemorrhage, neonatal situation and placenta whether adhesion or implant, with central placenta previa harm is the most serious, compared with the other two types of difference has statistical significance (P < 0.05).Conclusion Prenatal ultrasound diagnosis of different types o、f placenta previa and postpartum clinical coincidence rate was not statistically significant, and different types of placenta previa on pregnancy outcome has a great influence, especially the worst prognosis of complete placenta previa, so prenatal ultrasound diagnosis different types of placenta previa provides important reference and guidance significance of prenatal clinical treatment and prognosis.