Abstract： Objective:To investigate the prenatal ultrasonographic diagnosis method of aberrant right subclavian artery(ARSA)and evaluate the prognosis of fetus.Methods:This study was a retrospective study, a total of 102 gravidas of aberrant right subclavian artery, aged(29.4±3.8)years old, ranging from 21 to 45 years old, diagnosed in our hospital from March 2015 to December 2020 were retrospectively studied and followed up to analyze the prenatal ultrasound diagnosis characteristics of aberrant right subclavian artery and the clinical prognosis of fetus.Results:Prenatal sonographic scan of subclavian artery cross section combined with Doppler imaging can accurately diagnose aberrant right subclavian artery.Among 102 gravidas of aberrant right subclavian artery, 92 gravidas were diagnosed as simple aberrant right subclavian artery by prenatal ultrasound, of which 1 gravida was complicated with chromosomal abnormalities and terminated pregnancy, 91 gravidas were followed up for 6 to 12 months without obvious symptoms; 10 gravidas were complicated with other intracardiac and extracardiac malformations, of which 3 gravidas were complicated with chromosomal abnormalities and 5 gravidas chose to terminate pregnancy.Conclusions:Prenatal ultrasound has high accuracy in the diagnosis of aberrant right subclavian artery, which is of great significance to guide the clinical treatment of perinatal pregnant women and ARSA children in adulthood.