The invention relates to the field of medicament formulas, in particular to nutgrass galingale rhizome and nux vomica powder used for eliminating cancerous pain, which is prepared from raw materials of nutgrass galingale rhizome, nux vomica, rhubarb, amur corktree bark, mirabilite, turmeric, toad venom, manchurian wildginger, centipede, scorpion, red paeony root, clematis henryi, shinyleaf pricklyash root and gardenia through drying, grinding, and sieving by a 100-mesh sieve. The nutgrass galingale rhizome and nux vomica powder is characterized in that: the raw materials by weight percentage are 22 to 25 percent of the nutgrass galingale rhizome, 15 to 19 percent of the nux vomica, 6 to 8 percent of the rhubarb, 8 to 10 percent of the amur corktree bark, 12 to 14 percent of the mirabilite,3 to 5 percent of the turmeric, 0.06 to 0.08 percent of the toad venom, 0.6 to 1 percent of the manchurian wildginger, 5 to 8 percent of the centipede, 4 to 5 percent of the scorpion, 5 to 7 percentof the red paeony root, 1 to 3 percent of the clematis henryi, 3 to 5 percent of the shinyleaf pricklyash root and 3 to 5 percent of the gardenia. The nutgrass galingale rhizome and nux vomica powderhas low cost, high curative effect of eliminating the cancerous pain, and no addiction and dependency of medicaments or drug resistance, has effects of diminishing inflammation, resisting infection and strengthening immunity of organisms, and is suitable for multiple kinds of cancerous pain of primary affection.