The invention discloses an oral administration pharmaceutical composition for treating phthisis, which is prepared from lily bulb, roor of sessile stemona, donkey-hide gelatin, turtle shell, Chinese caterpillar fungus, Chinese angelica root, stellaria root, dried rehmannia root, prepared rhizome of rehmannia, lilyturf root, root of ballon flower, Sichuan fritillary bulb, sweet wormwood, anemarrhena rhizome, scrophularia root, large-leaf gentian root, root bark of chinese wolf berry, bletilla tuber, licorice root, aster and dark plum by a predetermined weight ratio. The medicament should be decocted in water for the oral dose.