Abdominal aortic aneurysms (AAAs) is a medical problem with high mortality rate, and so it is of great significance to understand its pathogenesis. One of main characteristics of the disease is extensive infiltration of macrophages, neutrophils and T-lymphocytes. Much evidence has confirmed that T lymphocytes are closely associated with the pathogenesis, but their role in the progression remains unclear. This article reviewed the possible roles of T lymphocytes in the pathogenesis of AAAs, and provided effective drug treatment strategies for the disease which still lacks of effective drug intervention.