Probiotic feed additive and production method and application thereof

The present invention discloses a probiotic feed additive. The feed additive comprises: 20-30 wt% of probiotic powder wrapped with waterproof coating layers, 50-60 wt% of compound Chinese herbal medicinal extract powder and 10-30 wt% of polydextrose; and wherein the probiotic powder wrapped with waterproof coating layers consist of 4-6 wt% of probiotic freeze-dried powder, 8-11 wt% of soybean lecithin, 0.5-1 wt% of microcrystalline cellulose and 83-87 wt% of polydextrose. A production method is as follows: the probiotic powder wrapped with waterproof coating layers, the compound Chinese herbal medicinal extract powder and the polydextrose are put into a mixer together, and the mixture is stirred evenly at a room temperature to obtain the finished products. Lactobacillus casei freeze-dried powder and/or lactobacillus acidophilus freeze-dried powder are used as the probiotic freeze-dried powder, and by combining the soybean lecithin and the microcrystalline cellulose, the probiotic powder wrapped with the water