Rheumatic heart valve disease is defined as damage to heart valve structures, fibrosis, adhesions, shortening, and stenosis or incomplete closure of single or multiple valves as a result of rheumatic heart disease. Doppler echocardiography plays an irreplaceable role in the diagnosis of rheumatic valve disease by providing information on valve morphology and hemodynamics, including the anatomy of the valves in valve disease, the severity of valve stenosis and regurgitation, the effect of valve damage on left ventricular morphology and function, and other associated cardiac abnormalities. A. Mitral stenosis and insufficiency of closure: mitral valve leaflet thickening, restricted activity, reduced opening amplitude, and reduced orifice area; the left ventricular long-axis view shows a domed anterior leaflet in diastole; the short-axis view shows the degree of leaflet adhesion; the area of the orifice can be found more accurately by applying the area method; the stenotic mitral orifice can show a colorful mosaic of jet bundles with a broadened, filled spectrum, which can be single-peaked; because of mitral leaflet docking The systolic mitral orifice may show a blue-based multicolored regurgitant beam and a negative spectrum due to poor mitral leaflet alignment and incomplete closure during systole. Aortic stenosis and incomplete closure: clinical symptoms of chest pain and syncope may occur, and apical five-chamber views may show thickened leaflets, echogenic enhancement, restricted opening, reduced orifice area, increased antegrade flow velocity, and centripetal hypertrophy of the posterior wall and septum of the left ventricle; in case of incomplete closure, multicolored regurgitant beams from the aortic orifice are detected in the left ventricular outflow tract during diastole. Tricuspid stenosis and incomplete closure: similar to the aforementioned valves, the tricuspid leaflet thickens, adheres, shortens, and the antegrade flow is a jet bundle; when the effective orifice surface decreases below 1.5 cm2, it causes increased pressure in the right atrium, stasis in the body circulation, jugular vein anger and edema, or stasis cirrhosis; in case of incomplete closure, the annulus is enlarged and systolic regurgitation from the right ventricular regurgitation into the right atrium can be detected by ultrasound. Pulmonary valve stenosis and incomplete closure: due to valve damage, the effective area of the pulmonary valve is reduced and the antegrade flow of the pulmonary valve is increased; in case of incomplete closure, a multicolored mosaic of regurgitant bundles appears in the diastolic pulmonary valve orifice to the right ventricular outflow tract. Fifth, combined valve damage, among the above valve damage, mitral valve damage is the most common, but can also be combined with several groups of valve damage.