1, grasp the timing of surgery: sinus tract acute infection period is not suitable for surgery. Surgery is suitable when there is little sinus discharge and no obvious redness, swelling and pressure pain in the vicinity. 2, adequate preoperative preparation: correct anemia and hypoproteinemia, control combined diseases. 3.Select appropriate anesthesia: epidural anesthesia or general anesthesia is appropriate. Since it is difficult to correctly determine the complexity of the sinus tract and the extent of resection before surgery, most abdominal sinus tracts reach deep into the preperitoneal space and often involve the peritoneum, muscle relaxation must be maintained before anesthesia to facilitate surgical operation. 4, the main points of surgery: routine sinus tracts within the Melan mark, try to complete excision of the sinus tract, thread, point coagulation hemostasis, there is good blood flow around the muscle flap filling the abdominal wall defect, the abdominal wall sinus tract deep into the preperitoneal space to remove the sinus tract bottom peritoneum, suture abdominal wall to use absorbable thread. The bottom of the incision placed miniature double cannula flushing drainage, double cannula another poke hole out. 5, postoperative treatment “for the use of muscle flap filler pressure bandage wound. Local physiotherapy should be given to those who have redness and swelling of the wound, and sutures should be removed promptly to fully drain those who have purulent secretions.