Abstract: [Abstract] Objective To enhance the application value of CT in diagnosis of acute appendicitis. Methods CT findings of 87 cases with acute appendicitis confirmed by surgery and pathology were retrospectively analyzed. Results There were 87 cases of acute appendicitis，45 cases of simple appendicitis，28 cases of suppurative appendicitis，7 cases of gangrenous appendicitis，7 cases of appendiceal abscess. CT findings of 5 cases of simple appendicitis were negative. CT showed swelling of the appendix，edema of the appendix wall and the abscess of the appendix.Conclusion CT imaging is of great value in the diagnosis of acute appendicitis.

Key words: [Key words] acute appendicitis, multi-planner reformation, Tomography, Diagnosis