The invention provides a preparation technology of a sow postpartum special feed. The preparation technology comprises the following steps of selecting matrix according to parts by weight, adding the matrix into water, steaming, naturally airing, and grinding into powder, so as to obtain a matrix powder; adding water and yeast powder into the matrix powder, stirring, and fermenting at room temperature, so as to obtain a fermenting matter; obtaining composite Chinese herbal medicine according to parts by weight, sterilizing by microwaves, adding into water, decocting by slight fire, filtering, uniformly stirring filtrate, fermenting matter and a food inducing agent, drying, and granulating, so as to obtain the sow postpartum special feed. The sow postpartum special feed for enhancing sow immunity has the advantages that the nutritional components of the feed are comprehensively contained; the physique deficiency after sow partum is supplemented, and the effects of tonifying blood and invigorating Qi, relieving diarrhea, tonifying spleen and promoting digestion, killing parasite in the sow, and increasing milking amount are realized; the mental state of the sow is quickly improved, the food intake amount is increased, the growth of piglets and the next partum of the sow are favorably realized, and the immunity of the sow after partum is enhanced.