Objective To investigate the application value of multi-slice CT scan and VR reconstruction technique in lower abdominal aortic aneurysm. Methods The clinical data of 30 patients with surgically and pathologically confirmed abdominal aortic aneurysm who were admitted in our hospital between January 2009 and 2015 were analyzed retrospectively. All cases underwent multi-slice CT scan. Meanwhile, the volume rendering (VR) and maximum intensity projection (MIP) were used for vascular remodeling. The application value of multi-slice CT scan and VR reconstruction technique in lower abdominal aortic aneurysm was analyzed. Results All the 30 patients with abdominal aortic aneurysm clearly showed the anatomical structure of the tumors, and the maximum transverse diameter of the tumors was 3.51-4.26cm. All lesions were originated from sites below the renal artery opening, involving the range of 4-8cm, 20 cases were complicated with mural thrombus inside the tumors, including half-moonshaped in 3 cases, crescent-shaped in 7 cases, irregular in 4 cases and annular in 6 cases; 10 cases of mural thrombus showed spotty and patchy calcification. In all cases, the size and shape of the aneurysm and the relationship between the aneurysm and branch vessels were displayed, and the spatial structure of the aneurysm and the surrounding tissues were directly reflected. However, the mural thrombus and hematoma range after aneurysm rupture can not be displayed clearly. After MIP reconstruction, 20 cases of 30 cases showed complication with different degrees of mural thrombus. The hematoma range after aneurysm rupture was accurately displayed. However, the size and shape of the aneurysm and the relationship between the aneurysm and branch vessels were difficult to displayed completely, based on once reconstruction. Conclusion Multi-slice CT scan and VR reconstruction technique are of high application value in lower abdominal aortic aneurysm, which can be used as an effective means for the diagnosis of abdominal aortic aneurysm.