The invention discloses a preparation method of pig feed for animal husbandry. The pig feed is prepared from fermented materials, wheat bran, corn flour, soybean meal, shell powder, processed salty tofu residues, pericarpium citri reticulatae, fructus crataegi and radix astragali. By a formulation of the pig feed, the problem of food shortage is solved, and pork of pigs fed with the pig feed is high in protein content, low in fat content, fresh and tender in texture and free of side effects on human bodies. Due to addition of Chinese herbal medicine components such as pericarpium citri reticulatae, fructus crataegi and radix astragali into the pig feed, efficacies of heat clearing, detoxifying, spleen strengthening, stomach tonifying, digestion and absorption promoting, metabolism improving and immunity improving are achieved, and pork flavor is improved.