Abstract： Objective To describe the situation of early stage of pelvic floor function and investigate the effect factors in postpartum women.Methods A retrospective survey was conducted,and women who did regular examination and gave birth in Peking University People's Hospital and had an annual pelvic floor examination at 6-12 weeks after delivery from Sep.2012 to Dec.2017 were interviewed.General information and pelvic floor electrical physiological indexes were collected and analyzed.Results Totally 5 143 puerpera were included in the study.The normal strength of type Ⅰ muscle was 52.40％ (2 695/5 143) and the normal strength of type Ⅱ muscle was 52.69％ (2 710/5 143).The abnormal degree of fatigue of type Ⅰ muscle was 55.84％ (2 872/5 143) and the abnormal degree of fatigue of type Ⅱ muscle was 27.34％ (1 406 / 5 143).Pelvic floor dynamic pressure was (93 + 37) cmH2O (1 cmH2O=0.098 kPa).The incidence of stress urinary incontinence (SUI) was 23.49％ (1 208/5 143) after delivery and it was as high as 57.58％ (95/165) for women who had family history of pelvic floor dysfunction.Family history of pelvic floor dysfunction was the risk factor of the fatigue index of type Ⅰ and type Ⅱ muscle (P＜0.05).The incidence of SUI was associated with vaginal delivery and age (＞30 years old) and family history of pelvic floor dysfunction (P＜0.01).Conclusions Pelvic floor electrical physiological indicators are reduced in about half of women in early postpartum stage.Age (＞30 years old) and vaginal delivery and family history of pelvic floor dysfunction are the risk factors.