The invention discloses a method for preparing lactating sow feed which belongs to the field of animal feeds. The feed is prepared from the following raw materials: high-quality corn, fried soybean, paddy, barley, green bran, bran, grass meal, fish powder, shell powder, calcium carbonate, iodate, iron lysine chelate, zinc lysine chelate, copper methionine chelate, multi-vitamin, and a traditional Chinese medicinal herbal additive which is prepared by decocting the following traditional Chinese medicinal herbs by a specific process: dandelion, cowherb seed, ligusticum wallichii, uniflower swisscentaury root, ricepaper pith, radix ophiopogonis, Chinese angelica, bighead atractylodes rhizome, platycodon grandiflorum, liquidambar formosana hance and cyrtomium rhizome. The feed is rich in nutrition and good in taste, can sufficiently meet the requirement for lactating sow and lactation, and is strong in disease resistance and high in safety.