Mitral stenosis is a common heart valve disease, the main cause of which is recurrent infection with rheumatic fever and degenerative valve disease in the elderly. The main treatment principles of mitral stenosis are prevention of infection, control of heart failure, improvement of myocardial remodeling, and control of complications. Active control of infection can reduce the triggering of heart failure, and once the disease is diagnosed, strenuous exercise should be avoided to avoid increasing the burden on the heart. Diuretics, such as furosemide and spironolactone, can be applied to reduce the cardiac load. Beta-blockers, such as metoprolol and bisoprolol, can be applied to control the ventricular rate to improve the prognosis, and oral warfarin, dabigatran, and rivaroxaban are required for anticoagulation if atrial fibrillation is present. If the stenosis is less than 1.5 cm2, percutaneous balloon mitral valve dilatation is required, and if the stenosis is moderate and the valve is calcified, surgical repair can be performed. If treatment by these means is poor, prosthetic valve replacement may be considered.