The invention discloses a medicament capable of treating gastric cancer by virtue of combined treatment of traditional Chinese medicine and western medicine. The medicament is prepared from the following raw materials in parts by weight: 52-71 parts of Hupeh fritillary bulb, 41-63 parts of longan aril, 38-55 parts of soapberry, 32-48 parts of processed rhizoma arisaematis, 26-38 parts of callicarpa macrophylla, 22-36 parts of manchurian lilac bark, 15-30 parts of folium sennae, 11-26 parts of okusa, 0.3-0.9 part of fluorouracil, 0.5-1.3 parts of tegafur and 0.1-0.8 part of mitomycin. Compared with treatment based on single traditional Chinese medicine or western medicine, the medicament capable of treating gastric cancer by virtue of combined treatment of traditional Chinese medicine and western medicine has a better curative effect, and is capable of improving the efficacy of Chinese herbal medicinal ingredients and western medicine to the greatest extent, giving play to complementation and promotion effects and improving the medical effect.