The invention provides a traditional Chinese medicine composition for treating gastric cancer. The traditional Chinese medicine composition is prepared from the following drugs by weight: 20g of raw pinellia tuber, 25g of raw Arisaema erubescens, 25g of centipedes, 30g of dried ground beetle bodies, 30g of hedyotis diffusa, 15g of donkey-hide gelatin, 15g of beggarticks, 30g of immature bitter orange, 30g of costus root, 45g of endothelium corneum gigeriae galli, 45g of crataegus pinnatifida, 60g of radix astragali, 45g of poria cocos, 45g of ganoderma lucidum, 30g of red ginseng, 30g of radix paeoniae alba, 30g of radix paeoniae rubra, 30g of safflowers, 30g of trogopterus dung, 30g of cortex moutan, 30g of rhizoma sparganii, 45g of salvia miltiorrhiza, 45g of angelica sinensis, 40g of herba epimedii, 45g of rhizome alismatis, 40g of rhizoma pleionis, 15g of lonicera japonica, 30g of emblic leafflower fruit, 30g of dried ginger, 20g of ophiopogon root and 20g of radix curcumae. The traditional Chinese medicine composition has a remarkable treatment effect on the gastric cancer.