A medical herb composition for the alleviation of cardiopulmonary ailments or the improvement of cardiopulmonary function in a mammal is disclosed. The medical herb composition comprises: Schisandra extract; Ginseng extract; Radix ophiopogonis extract; and Saliva miltiorrhiza extract. The medical herb composition comprising the extracts above is proved to be efficient in enhancing cardiopulmonary function of a mammalian patient without heart disease, enforcing energy and raising strength. The medical herb composition is also capable of reducing the symptoms of breathing difficulties and stagnation of vital energy.