The invention discloses a pharmaceutical composition for treating lung cancer. The pharmaceutical composition is prepared from the following active pharmaceutical ingredients in parts by weight: 15-18parts of radix ginseng, 15-18 parts of radix scrophulariae, 15-18 parts of radix astragali, 15-18 parts of radix adenophorae, 15-18 parts of sichuan fritillary bulb, 15-18 parts of balloon flower, 15-18 parts of radix sophorae flavescentis, 15-18 parts of rhizoma atractylodis macrocephalae, 15-18 parts of heartleaf houttuynia herb, 15-18 parts of herba rabdosiae rubescentis, 15-18 parts of herbascutellariae barbatae, 15-18 parts of spreading hedyotis herb, 15-18 parts of rhizoma paridis chinensis, 15-18 parts of radix cynanchi paniculati, 15-18 parts of bittersweet herb, 15-18 parts of blacknightshade herb, 15-18 parts of herba taraxaci, 15-18 parts of folium cycas, 15-18 parts of Chinese honeylocust spine, 15-18 parts of semen plantaginis, 15-18 parts of radix scutellariae, 15-18 partsof rhizoma pinelliae, 15-18 parts of apricot kernel, 15-18 parts of rhizoma curcumae, 15-18 parts of radix notoginseng, 15-18 parts of Chinese blister beetle, 15-18 parts of scorpion, 15-18 parts ofmercurous chloride and 15-18 parts of pearl powder. The pharmaceutical composition disclosed by the invention can effectively relieve the symptoms of lung cancer.