The invention discloses a preparation method of a special feed for Huai sows, capable of increasing the farrowing rate of sows. Based on a fermented soybean meal feed, a compound bacterium agent is used for fermenting a Chinese herbal medicine complete feed, part of feed protein is decomposed into small peptides and free amino acids, and sour fragrance is provided for a fermented feed, so that the palatability is improved, the feeding is promoted, the digestibility and the digestive ability of the feed are improved, and the growing performance of the sows is improved. The special feed has the effects in the respects of advanced sexual maturity, flushing, rapid postnatal oestrus and the like, the propagation rate is increased, and Chinese herbal medicines have the advantages of being low in toxicity, free from drug resistance, economical, practical, multifunctional and the like. The conversion rate, the bacteria resistance and the worm expelling capacity of the feed are notably increased, the production performance of the sows is improved, and the tolerance of the sows is improved. According to the feed for the sows, provided by the invention, the nutrient level of the sows can be effectively increased, the intestinal flora balance can be improved and maintained, the immunity and the disease resistance can be improved, the feed is free from antibiotics, green and safe, the farrowing rate of the Huai sows can be notably increased, and the breeding gain can be increased.