Objective To explore the diagnosis effect of fetal congenital heart disease in heart echocardiography.Methods By echocardiography in 2300 pregnant women of prenatal screening,Observed the fetals’ four-chamber view,aortic cross-section,three vascular section,long axis view of aortic arch,ductus arteriosus arch long axis view.Results 2300 cases of fetal antenatal examination found 69 cases with abnormal psychology fetal heart,23 cases with congenital heart disease,3 cases in diagnosis,1 case misdiagnosis.Conclusion Heart echocardiography can effective diagnosis the fetal congenital heart disease,plays an important role in improving born population quality,and reducing infant mortality.