(1) With the ageing of our population aged 60 or older the incidence of acute appendicitis increase in the total number of acute appendicitis about 10% of adults over 40 years of age 10%. (B) the elderly often suffer from various organs and other diseases such as coronary heart disease, the higher the mortality rate of acute appendicitis, and the increasing age and higher. According to statistics of acute appendicitis age mortality rate for the 60-69 age group 17% more than 70-year-old group was 40%, such as within 12 hours of the onset of immediate surgery mortality rate was 13.3%. (C) low resistance to the elderly low wall Po appendectomy, the hardening of the blood vessels, about 30% of the patients attending has been perforated appendix. In addition, the elderly have greater omentum shrinking perforation inflammatory difficult constraints, the merger purulent peritonitis more opportunities. (D) not typical clinical manifestations, the elderly low response capacity, abdominal pain not obvious, and often without metastatic characteristics. As has been shrinking muscles, and even has been perforated appendix, peritoneal irritation were not evident. Appendiceal abscess formation around sometimes, the right lower quadrant mass there, but not with acute inflammation performance, it is clinically ileocecal malignant tumor. (5) the elderly often coexist with cardiovascular disease, chronic pulmonary disease, gastrointestinal diseases and metabolic diseases such as diabetes, the symptoms of these diseases may be related to the clinical manifestations of acute appendicitis confused, an increase of the difficulty of diagnosis. (6) Old Age is not the taboo of surgery, in addition to simple appendicitis under close observation, conservative treatment, and other types of surgery for appendicitis must. However, to strengthen preoperative preparation and postoperative treatment to ensure the safety of operation and reduce the incidence of postoperative complications.