【】 Objective: To investigate the causes of the abnormal aorta blood flow abnormal spectrum and the indirect diagnostic value in the diagnosis of coarctation of the aorta and interrupted aortic arch. Methods: 17 cases of abdominal aorta abnormal spectrum were examined by echocardiography, Correlative angiography was available in all of the patients within a week. Results: In this group, the abnormal aorta blood flow spectrum showed a continuous spectrum of low flow rate, 13 cases of coarctation of the aorta, 4 cases of interrupted aortic arch, All cases were confirmed by the digital subtraction angiography(DSA) or CT angiography(CTA). Conclusion: The abnormal spectrum of the continuous low flow velocity of the abdominal aorta is the important indirect ultrasonographic signs of the corresponding congenital heart disease, so as to improve the ultrasonic detection rate and avoid missed diagnosis.