Stress urinary incontinence is also known as tension incontinence. When abdominal pressure suddenly increases, urination is lost and urine flows involuntarily from the urethra. It is a common condition in adult women. In men it is seen in about 20% after prostate surgery. When normal abdominal pressure increases, the intra-vesical pressure increases in proportion to the intra-urethral pressure, the intra-vesical pressure is always lower than the intra-urethral pressure, and the bladder neck and urethra are closed. The urethra looks to counteract any increase in abdominal pressure without incontinence. Due to changes in the supporting tissues and anatomy of the urethra, urethral resistance is reduced and there is usually no incontinence, and when abdominal pressure suddenly increases, such as in the case of coughing, laughing, sneezing, standing, running, etc., urine does not flow freely. The main reasons for its occurrence are: 1. Functional abnormalities: due to congenital dysplasia, diabetes, malnutrition, female hormone deficiency and other reasons to the pelvic floor muscles and fascia, including the bladder neck next to and around the proximal urethra tissue relaxation, the bottom of the bladder and proximal urethra downward displacement, urethral length shortening, urethral bladder posterior angle disappears. When the abdominal pressure increases, the pressure in the bladder increases accordingly, while the pressure in the urethra increases less or does not increase, causing the pressure in the bladder to be temporarily higher than the pressure in the urethra, so that urine loses its normal control and urinary incontinence occurs. 2, local injury: such as multiple births, difficult deliveries and their midwifery operations or surgical injuries, such as perineal, vaginal, prostate, urethral surgical injuries and trauma to the pelvic floor, bladder neck urethra around the tissue damage, or factors that make the posterior angle of the bladder urethra disappear; 3, external compression: such as tumors, pregnancy, vaginal anterior wall bulge compression, etc. The above causes cause pelvic floor muscle relaxation, bladder neck, urethral mobility increase, there is a certain degree of internal urethral sphincter insufficiency, bladder neck and proximal urethra poor closure, when the abdominal pressure increases and stress incontinence occurs. There are numerous surgical options for stress urinary incontinence, which are broadly divided into three categories: bladder neck suspension, pubovaginal suspension, and urethrovaginal suspension.