Abstract: Objective To explore the relationship between different modes of delivery and the occurrence of early postpartum pelvic floor dysfunction (PPFD).Methods Medical records of 1706 puerperants who reviewed at postpartum 6-10 weeks. According to the delivery mode they were divided into group of selective cesarean section with 621 cases and group of vaginal delivery with 1085 cases. Early postpartum pelvic floor functions were evaluated by pelvic floor muscle and by using pelvic floor dysfunction clinical questionnaire about obstetric factors to stress urinary incontinence (SUI) and pelvic organ prolapse (POP) influence.Results The rate of type I and type II muscle strength there was no significant difference between the different delivery groups (P> 0.05), but significant difference in rate of SUI and POP between different modes of delivery. The pelvic floor muscle strength of type I muscle fiber abnormal rate of vaginal delivery group 62.67%, selective cesarean section group 58.62% (P> 0.05); The abnormal rate of pelvic floor muscle fiber type II muscle, vaginal delivery group 60%, elective cesarean section 56.52% (P> 0.05); there was no significant difference between the different modes of delivery. The incidence of postpartum SUI was 14.01% in vaginal delivery and 5.96% in caesarean section (P< 0.05). Pelvic prolapse vaginal delivery group 0 degree 43.04%, I degree 49.03%, II 7.93%, selective cesarean section group 0 degrees 63.76%, I 34.30%, II 1.93%; two group the difference was statistically significant (P< 0.05).Analysis of related factors showed that age, parity, and time of the second stage of labor, Newborn Birth Weight (NBW) were positively correlated to the occurrence of pelvic floor muscle damage, SUI and POP (P< 0.05).Conclusion Pregnancy and delivery are risk factors for postpartum pelvic floor dysfunction, age, parity, NBW and duration of the second stage of labor is the main influencing factors.