The invention discloses a medicament for treating streptococcus pneumonia infected pneumonia and a preparation method thereof. The medicament is prepared from the following raw medicinal materials: straight ladybell, pericarp of bretschneider pear, mongolian snakegourd root, root of lobed kudzuvine, fritillaria, fragrant solomonseal rhizome, rhizome of Chinese tupistra, edible manna lichen, rhizome of giantreed, herb of marestail, herb of little platanthera, raw milkvetch root, codonopsis pilosula, inner shell membrane of fowl's egg, herb of wight parnassia, licorice root, frost mulberry leaves, platycodon root, herb of common peganum, peucedanum medicum dunn, herb of threeflower bluebeard, herb of fourangled circaea, dried rehmannia root, japonica rice, filliform cassytha herb, all-grass of intermediate peashrub, herb of ceylon leucas, root of siebold primrose, rhizome or herb of purple bergenia, fermented soybean, white hyacinth bean, divaricate saposhnikovia root, fresh ginger and citrus aurantium. The medicament disclosed by the invention has the following beneficial effects: the medicament has the effects of clearing heat to moisten the lung, nourishing yin, promoting the secretion of saliva, supplementing qi, tonifying the lung and dispelling wind to dredge collaterals, and is mainly used for treating dryness evil lung-injuring type streptococcus pneumonia infected pneumonia; and the medicament is simple and convenient in preparation process, small in toxic or side effects, convenient in administration, easy to manufacture and low in cost, can directly reach a focus, is short in curative time, and can avoid relapse after curing.