Simple moderate mitral regurgitation and no corresponding clinical symptoms, can not be surgical treatment, if the patient has related symptoms, such as chest tightness, shortness of breath, etc., after a clear diagnosis of the need for medication, drug treatment is ineffective for surgical treatment. Moderate mitral regurgitation is generally between 4~6cm², if the patient does not have clinical symptoms, conservative treatment can be used, observation and follow-up, regular review, may not be surgical treatment. However, if the patient has symptoms such as ischemia, shortness of breath, chest tightness, and activity limitation, it is necessary to find out whether it is related to mitral regurgitation, and if it is, it is necessary to further improve the relevant examinations, evaluate the cardiac function, and whether there are other complications, and then comprehensively determine whether it is necessary to carry out surgical treatment. For moderate mitral regurgitation patients need to strictly monitor their own status, regular review, the emergence of uncomfortable symptoms need to consult a doctor in a timely manner, under the guidance of the doctor’s medication, drug treatment is ineffective to consider surgical treatment.