目的　应用彩色多普勒超声诊断腹主动脉夹层动脉瘤。方法　应用彩超测量腹主动脉内径 ,观察腹主动脉及其分支内膜分离的部位和范围 ,以及鉴别真假腔。结果　内膜分离是本病最可靠的诊断依据 ,血流分隔现象、动脉扩张和管腔内血栓等具有重要的辅助诊断价值。彩超能很好地鉴别真假腔和诊断夹层动脉瘤破裂。结论　彩超能正确地评价本病受累血管 ,是诊断腹主动脉夹层动脉瘤的一种较为可靠的影像检查方法。 Objective To use color Doppler ultrasound to diagnose abdominal aortic dissection. Methods The diameter of the abdominal aorta was measured by color Doppler ultrasound to observe the site and extent of the separation of the abdominal aorta and its branches, and to identify the true and false lumens. Results Endometrial separation is the most reliable diagnostic basis for this disease. Separation of blood flow, arterial dilatation and intraluminal thrombosis have important diagnostic value. Color Doppler ultrasonography can well identify true and false lumens and diagnose ruptured aneurysms. Conclusion Color Doppler ultrasound can correctly evaluate the affected blood vessels, which is a reliable imaging examination method for diagnosing abdominal aortic dissection.