Urinary fistula injury is natural and irregular, especially the pressure necrotic caused by birth injury or previous drug corrosion of the vagina to severe anterior vaginal wall necrosis detachment of the person, not only to form a complex, huge fistula, but also lead to the complete absence of urethra, vaginal scarring adhesion, stenosis, or contracture of the bladder, and even the ureter is directly connected to the vagina. Then what are the treatment and diagnosis of postoperative urinary fistula? All urinary fistulas should strive for surgical treatment. In order to ensure the success of surgical repair, preoperative assessment should be carried out and individualized treatment should be given. Determine the nature, location, type of urinary fistula, choose the appropriate timing of surgery. According to the type, nature, location and size of the fistula, the choice of surgery. The principle is to prefer simple surgery, do not arbitrarily expand the scope of surgery and surgery time. Prevent infection. Patients often have long-term urine leakage, difficult to get close to people, and because of the long-term need to use urinary pads, resulting in mobility, work inconvenience, so the spirit of depression, pain. Generally speaking, it is not difficult to diagnose a urinary fistula based on history, symptoms and gynecological examination. But to determine the location of the fistula, sometimes need to take a certain position and do some auxiliary tests and cystoscopy, urography and so on to determine.