Infected abdominal aortic aneurysm (IAAA) is a special type of aneurysm caused by infection of various pathogenic bacteria. IAAA is characterized by acute onset, rapid progression, high risk of aneurysmal rupture and dismal clinical prognosis. So, early diagnosis and treatment of this condition are extremely critical. Diagnosis can be made based on typical medical history, laboratory tests, CTA images, intraoperative findings, positive results of blood culture or tissue culture. After diagnosis, surgical treatment should be performed as soon as possible on the basis of adequate antibiotic therapy. However, there is no agreement on specific antibiotic treatment options and surgical options so far. It is currently recommended to use antibiotics for at least 6 months after surgery. With the development of minimally invasive techniques, the proportion of IAAA treated by endovascular repair has been increasing with favorable short-term results. Endovascular therapy is expected to be the first choice of options for IAAA in the future.