The invention discloses a ferment feed for pigs. The ferment feed for the pigs comprises the following raw materials: 20 parts of bean worm ferment liquid, 40 parts of wheat flour, 40 parts of oat flour, 50 parts of rice bran flour, 30 parts of corn flour, 25 parts of potato flour, 10 parts of superfine ore powder, 15 parts of superfine bone meal, 10 parts of casein, 25 parts of peanut meal, 25 parts of rapeseed cakes, 20 parts of seaweed meal, 6 parts of semen raphani, 3 parts of fresh gingers, 5 parts of mugwort leaf paste, 5 parts of compound vitamins, 5 parts of unsaturated fatty acid, 5 parts of edible salt, 12 parts of selenium-enriched yeast, 2 parts of enzyme bacteria, and 0.08 part of tea saponin. The invention further discloses a preparation method of the ferment feed for the pigs. The ferment feed for the pigs disclosed by the invention is capable of increasing appetite, feed intake and disease resistance of the pigs; moreover, the ferment feed is also capable of increasing selenium content of pork while reducing heavy metal content of the pork, as well as significantly raising edible values of the pigs and economic income of the farmers.