Objective To investigate the related factors of de novo stress urinary incontinence after pelvic floor reconstruction.Methods Retrospectively analyzed the clinical data of 714 patients who acceptted pelvic reconstruction surgery in our hospital from November 30,2005 to November 30,2015.Among the 714 cases,there were 544 cases without preoperative urinary incontinence.The possible related factors of de novo SUI caused by operation were statistically analyzed.Results There were 151 cases of de novo stress urinary incontinence after pelvic floor reconstruction,the incidence was about 30.5%.With a history of diabetes,fetal delivery,pelvic surgery and POP surgery(laparoscopic vaginal apical fixation of sacrum) were the risk factors for de novo stress urinary incontinence after pelvic floor reconstruction,and the OR values were 2.575,5.286,1.671 and 1 respectively.There was no correlation between other general data and POP stage(P<0.05).Conclusion When performing pelvic floor reconstruction surgery for POP patients with high risk factors,it's better to have urinary incontinence surgery simultaneously according to individual circumstances and wishes.