Due to the complications of TVT and TOT surgery, the third generation of SIMS surgery came into being. In 2006, single-incision TVT surgery began to be reported and a variety of products appeared. These surgeries have three distinctive features while following the basic principles of TVT surgery: 1. The surgery uses a single incision, with only an entrance but no exit; 2. The sling is shortened, with a length of only 8-14 cm; 3. The sling or its fixation devices do not penetrate the closed fossa or the retropubic space, thus reducing the damage to the bladder, bowel and blood vessels, and also reducing postoperative pain, especially in the groin and buttocks. Some scholars call TVT and TOT the standard mid-urethral sling procedure and the third generation the SIMS procedure. Vaginal erosion occurs in mid-urethral tension-free suspensions and is present in both SIMS and SMUS. tieu reported 98 patients randomized to the line versus the group and 1 patient in both groups experienced vaginal erosion of the sling at 1 year postoperatively, with a similar incidence. A study with a larger semi-randomized sample size showed 2 cases of vaginal erosion at 24 months postoperatively in 157 patients who underwent the procedure and 1 case in 118 patients who underwent the procedure, both with lower incidence rates and no statistically significant differences. The incidence of postoperative incontinence and the need for reoperation after SIMS varies widely by product, and from the published data to date, the incidence of recurrent incontinence requiring reoperation with TVT-Secur is high and the difference with SMUS is statistically significant. 98 patients underwent surgery with Hinoul, and none had incontinence severe enough to require reoperation after surgery, while 97 patients undergoing SIMS (TVT- Secur), 14 of the 97 patients required reoperation. The recurrence rate of single-incision TVT-Secur surgery for urinary incontinence was also shown to be higher than that of SMUS through evidence-based studies, and the subjective and objective cure rates of patients were worse with TVT-Secur; Mostafa’s report concluded that the difference between SIMS (Adjust) and postoperative reoperation was not statistically significant; Schweitzer’s study obtained better results, with No 1 case required reoperation after SIMS(Adjust) in 100 cases. In summary, the literature suggests that SIMS surgery is superior to SMUS in terms of operative time, postoperative pain and return to normal life and activities; it is not significantly different from SMUS in terms of new-onset urinary urgency, incidence of vaginal erosion, impact on sexual life and postoperative difficulty in urination; the postoperative cure rate, incidence of reoperation and patient satisfaction in Ajust? and needleless are not statistically different from SMUS Ajust? and needleless had no statistically significant differences in postoperative cure rate, reoperation rate and patient satisfaction from SMUS, while Secur and Ophira were worse than SMUS.