The stoma retrieval surgery should be done 3-6 months after the fistula, when the wound has healed and the bowel function has been restored. A fistula is an artificial opening in the abdominal wall to remove a section of the colon from the abdominal cavity to make a temporary or permanent bowel exit instead of the anus. At 3~6 months after fistula surgery, the wound has healed, the structure and function of the intestines inside the wound have basically recovered, and the intestinal adhesions have gradually formed, so it is better to perform stoma re-instatement surgery at this time, and the difficulty of the surgery will be reduced relatively, and it is also relatively safe. The main purpose of the stoma surgery is to return the bowel which has been placed outside the abdominal wall to the abdominal cavity and perform anastomosis with the bowel in the abdominal cavity, so as to let the bowel be discharged from the anus and rebuild the normal physiological structure. The exact timing of the stoma retrieval surgery should be decided under the supervision of the doctor. Before the surgery, patients need to clean the intestinal tract, pay attention to quit smoking and drinking, appropriate exercise, prevent constipation, etc. to promote the recovery of intestinal function and return to normal life.