Formula preparation for improving lactation ability of sows and preparation method

The invention provides a formula preparation for improving the lactation ability of sows and a preparation method, and belongs to the technical field of livestock breeding. The formula preparation comprises the following raw materials in parts by weight: 2.5-3.0 parts of a composite additive, 12-15 parts of composite Chinese herbal medicine powder, 8-10 parts of milk powder, 20-22 parts of goose eggs and 80-120 parts of soybean milk; the composite additive comprises soy isoflavone, chitosan oligosaccharide and vitamin E; the composite Chinese herbal medicine powder comprises motherwort, isatis root, radix astragali, humifuse euphorbia herb, fructus fici, cowherb seed and tetrapanax papyriferus. The raw material composition of the formula preparation is formed by continuous screening and congealing of the inventor in clinical practice for many years, and has good effects of increasing the feed intake of sows, reducing constipation, increasing the lactation yield, improving the milk quality, increasing the surv