Postoperative complications of perforated appendix peritonitis commonly include abdominal infection, intestinal adhesions, intestinal fistula, appendiceal stump infection and incision infection. Patients with perforated appendix peritonitis are susceptible to residual infections, i.e., new abscesses in the abdominal cavity, bowel, pelvis, or elsewhere, which are called abdominal infections, if the drainage is incomplete and the abdominal cavity is not cleanly treated. After appendiceal perforation, the surrounding intestines are affected, and coupled with surgical trauma, patients are prone to intestinal adhesions or even intestinal obstruction. Patients with perforated appendix usually have significant edema in the appendix area and brittle tissues, and may develop intestinal fistulae if they are more susceptible to dislodgement of thread knots or necrosis of tissues after treatment of the appendix stump. Postoperative appendiceal stump inflammation is likely to occur if the patient has insufficient intraoperative resection, incomplete resection, or inflammation of the appendiceal stump after ligation. Patients with perforated appendix peritonitis are more likely to develop infection or fatty liquefaction of the incision postoperatively. In case of postoperative perforated appendiceal peritonitis, intravenous antibiotic therapy with levofloxacin, ceftriaxone sodium, etc. is routinely required. Patients who feel abnormalities in the incision or discomfort after surgery should promptly report to their doctor to avoid delays.