Objective To study the imaging findings and diagnostic value of CT in acute appendicitis and the associated complications. Methods Sixty-two patients with suspected acute appendicitis admitted in our hospital between March 2012 and September 2015were selected as study subjects and were examined by CT. With the results of surgical and pathological diagnosis as the golden standard, the diagnostic value of CT in the diagnosis of acute appendicitis was evaluated. Results Among the 62 cases, 55 cases were diagnosed as acute appendicitis. CT diagnosedacute appendicitis in 54 cases, and 53 cases with acute appendicitis were correctly detected by CT. The sensitivity, specificity and accuracy of CT in the diagnosis of acute appendicitis were 96.4%, 85.7% and 95.2%, respectively. The CT findings of acute appendicitis included enlarged appendix, tube wall thickening, inflammatory exudation around the appendix, stercolith in the appendix, appendix cavity effusionand abscessaround the appendix, etc. Conclusion CT examination can diagnose acute appendicitis in time, effectively reduce the incidence of missed diagnosis and misdiagnosis, which plays an important role in the diagnosis and treatment of acute appendicitis.