Mitral valve insufficiency should be mitral valve insufficiency. When the symptoms of mitral valve insufficiency are not obvious, it can be evaluated by the doctor and treated conservatively with cardiac nutrients and other drugs; if the symptoms are obvious and the cardiac function is affected, it is necessary to carry out the surgery under the extracorporeal circulation in a timely manner, which can be categorized into mitral repair and plasty, and mitral valve replacement surgery. 1. Internal medicine treatment: first of all, avoid excessive physical labor and strenuous exercise; limit sodium intake. If acute heart failure occurs, cardiotonic, diuretic, and vasodilator treatments can be given; atrial fibrillation may occur in some patients at the later stage of the disease, and anticoagulant therapy can be considered on the basis of the previous treatment. 2. Mitral valve repair and molding: The patient’s own tissues and some artificial substitutes are used to repair the mitral valve device and to promote its restoration of function, including reconstruction and reduction of the annulus, shortening or lengthening of the papillary muscles and tendon cords, implantation of artificial annulus and tendon cords, and repair of the valve leaflets. 3. Mitral valve replacement: Patients with severe damage to the mitral valve, which is not suitable for valve repair, can be treated with mitral valve replacement. The mitral valve leaflets and tendon cords are removed, and the prosthetic valve is sutured and fixed to the annulus. The two main types of prosthetic valves used in clinical practice are mechanical valves and biologic valves. When mitral valve insufficiency occurs, it is necessary to pay attention to timely visit the hospital and choose the appropriate method of treatment under the guidance of the doctor. Surgery needs to be performed under the guidance of specialized doctors to strictly avoid contraindications.