Objective To analyze the related factors of postpartum hemorrhage in patients with placenta previa, provides the sci-ence for clinical treatment. Methods 160 patients with placenta previa, according to whether the postpartum hemorrhage were di-vided into the control group of 116 cases, the observation group of 44 cases. Results The patients in the observation group were significantly higher than the control group, the difference was statistically significant(P<0.05);the observation group maternal time is more than 2 times, a history of uterine surgery, preterm labor patients were significantly higher than the control group, the dif-ference was statistically significant(P<0.05);constituent ratio of different patients in the observation group and the control group of patients with placenta previa types, the difference was statistically significant (P<0.05);multiple factor analysis showed that age, parity and uterine surgery history and preterm labor patients more prone to postpartum hemorrhage, and marginal placenta previa, partial and complete placenta previa postpartum hemorrhage is more likely to appear. Postpartum hemorrhage is associated with many factors. Conclusion Patients with placenta previa, comprehensive consideration should be the treatment process.%目的：分析前置胎盘患者发生产后出血的相关因素，为临床治疗提供科学。方法160前置胎盘患者，按照是否出现产后出血分为对照组116例，观察组44例。结果单因素分析显示：观察组患者年龄明显高于对照组，差异有统计学意义(P<0.05)；观察组孕产次≥2次、有子宫手术史、早产患者比例明显高于对照组，差异有统计学意义(P<0.05)；观察组患者与对照组患者前置胎盘类型构成比不同，差异有统计学意义(P<0.05)；多因素分析结果显示：年龄高、产次多、有子宫手术史及早产患者更容易出现产后出血，同时与边缘性前置胎盘比较，部分性和完全性前置胎盘更容易出现产后出血。结论前置胎盘患者出现产后出血与多种因素有关，治疗过程中应综合进行考虑。
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