The invention provides a feed detoxication additive for pig culturing. The additive comprises, by weight, 6-12 parts of tubers of radix stemonae, 6-12 parts of pine needles, 6-12 parts of gingko leaves, 6-12 parts of radix sophorae flavescentis, 3-6 parts of radix isatidis, 3-6 parts of peeled roots of herbaceous peony, 1-3 parts of dried fruits of forsythia, 1-3 parts of seeds of zanthoxylum bungeanum, 1-3 parts of medicated leaven, 1-3 parts of acacia catechu extracts, 0.2-0.4 part of calcium formate, 2-4 parts of perilla seed oil and 8-14 parts of prepared silica sol and slags. The feed additive has the advantages that the immunity of piglets can be enhanced, and the harm on pigs by residual toxins in feed is reduced.