The invention provides livestock and poultry feed with addition of a scouring rush herb. As an additive added into the livestock and poultry feed, the scouring rush herb, a Chinese medicinal herb, is weighed according to a proportion. After impurities in the scouring rush herb are removed, the scouring rush herb is naturally dried or baked to be dry at a temperature of 60 DEG C, and the moisture content in the herb is reduced below 10%, the herb is crushed to 20-80 meshes fine powder which is mixed with the prior feed according to the proportion, and the mixture is the product of the invention. The addition of the scouring rush herb as the additive can enable the livestock and poultry feed to have the functions of invigorating qi and strengthening the spleen, preventing diseases and keeping health, enhancing feed efficacy and promoting growth, thereby improving the immunity and the meat quality of the livestock and the poultry, as well as the egg production of the poultry and the quality of egg products. The material resource of the scouring rush herb is rich and abundant, and cheap in price. The addition of the scouring rush herb into the feed can reduce conventional feed consumption, and reduce feed cost.