【Abstract】Acute aortic dissection (AAD) is an acute and severe cardiovascular disease in Emergency Department. Medication therapy and (or) surgical treatment can effectively improve the prognosis of patients with AAD, but the mortality rate is still high. Early diagnosis and risk evaluation for AAD are crucial for patients to receive effective interventions. At present, early diagnosis and risk stratification for AAD have made progress, but it is still difficult to obtain an ideal tool for diagnosis and risk evaluation in ED. In this present article, we reviewed the research progress of early diagnosis and risk evaluation for AAD.