With rapid advances in biomedical engineering and cardiac surgery, prosthetic valves are increasingly being used in the treatment of anemophilic valve disease and other valve damage. Color multispectral ultrasound can evaluate the function of the prosthetic valve, including the type of prosthetic valve, position, opening and closing status, calculation of transvalvular pressure and orifice area, grading of regurgitation, left ventricular size and systolic function, and determination of pulmonary artery systolic pressure, and the examination can also reveal whether other valve damage is combined. For the observation of complications, ultrasound focuses on the following aspects: i. Prosthetic mechanical valve perivalvular leak: a blue regurgitant bundle starting from outside the valve annulus during systole is seen in the shape of a fountain, mostly eccentric. II. Prosthetic mechanical valve stenosis: reduced valve opening is seen, and the diastolic jet is a bright, predominantly red, multicolored flow bundle. (c) Prosthetic valve thrombosis: 2D ultrasound shows thickening of the prosthetic valve, thickening of the valve frame, irregular flocculent echogenicity, strong echogenic masses when the thrombus is large or old, and the thrombus can be located in the valve perimeter or on the valve frame. Color multispectral sound shows stenosis or incomplete flow signal due to thrombus formation.