Stress urinary incontinence (SUI) is a common disease in urology.Studies have reported that 29%-75% of women have urine leakage before and after menopause, with a mean of 48%. 1 SUI is more common in middle-aged and older women with multiple pregnancy history, postmenopausal, and pelvic organ prolapse. The pathogenesis of SUI includes the relaxation of pelvic floor muscles, the thinning of pelvic floor tissues, and the decline of urethral mucosal sealing function, resulting in insufficient urethral closure pressure.When abdominal pressure increases, the posterior urethral pressure is less than the bladder pressure, so the urine cannot be controlled automatically and flows out. 2 The primary manifestation of SUI is the involuntary leakage of urine when abdominal pressure increases due to actions such as strenuous exercise or sneezing. There are various treatment methods for SUI, which are divided into conservative treatment and surgical treatment. However, surgical treatment is usually chosen because of the unsatisfactory effect of conservative treatment such as pelvic floor muscle function exercise or hormone treatment. 3 Since Delancey 4 put forward "the hammocks hypothesis," most scholars believe that the key to urinary control surgery lies in restoring the support structure of the urethra rather than the anatomical position of the urethra. The mid-urethral sling (MUS) has gradually become the mainstream surgical method for the treatment