Acute appendicitis after gangrene perforation can cause peritonitis, then the best treatment is emergency surgical treatment, you can choose open surgery, the surgery is traumatic, slow recovery, but the success rate of surgery is high. Laparoscopic appendectomy can also be chosen. Laparoscopic surgery is less traumatic and has faster recovery, but there is a possibility of intermediate open abdomen. In case of appendiceal perforation and formation of appendiceal abscess with large omental encapsulation, conservative anti-inflammatory treatment should be performed. laparoscopic appendectomy should be performed after 3 months.