1, bleeding and hematoma: Different kinds of vesicovaginal fistula repair are due to small surgical field, heavy adhesions, exposure difficulties, accidental injury to the surrounding thicker blood vessels, or because of the surrounding scar tissue is hard to stop bleeding, and cause more than bleeding in the wood or postoperative bleeding to form a hematoma; 2, infection: vesicovaginal fistula patients are combined with varying degrees of urinary tract infection, fistula repair trauma is still in contact with contaminated urine, as well as surgical damage to the tissue, so that the inactive tissue or the use of multi-strand sutures caused by the residue of foreign bodies in the wound, all of these factors can make the repaired scar infected and septic, resulting in poor healing, again forming a fistula. The fistula can be repaired by infecting the wound with pus, leading to poor healing and the formation of another fistula. Therefore, good drainage to keep the bladder empty is the main measure to prevent fistula repair failure; 3. Ureteral injury/stenosis: the surgical site of vesicovaginal fistula is close to the ureter and most of the adhesions are severe, which can easily damage the ureter; patients with fistulas located at the edge of the ureteral opening, if not treated intraoperatively, can easily lead to postoperative ureteral opening stenosis or atresia, and can usually undergo ureteral bladder reimplantation; 4. Re-urinary fistula: The cause of genitourinary tract urinary fistula is local ischemic necrosis, and surgical repair does not exclude late vascular occlusion of local tissues, leading to local ischemic necrosis again and re-generation of urinary fistula.