The company applies its safe and efficient food-grade products, Bacillus subtilis and its bactericidal peptides as feed additives in the livestock industry. This product utilizes natural microbial genetic resources and establishes a mature and stable production process using metabolic engineering regulation technology. Domestic and research groups have conducted in-depth studies on the effects of specific Bacillus subtilis and its bactericidal peptides on the growth performance, immune function,inal microbiota, and blood indicators of weaned piglets and broiler chickens. The results show that these products perform better than conventional antibiotics in terms of feed digestion and utilization, growth-promoting effects, and environmental carbon emission impact. The addition of 200ppm of these products to the weaned piglet's diet reduces the rate by more than 85%, making the pig's feces more formed, increasing weight gain by 5-10%, improving the feed conversion rate by5-10%, and reducing the use of antibiotics in livestock production by more than 60%. This effectively solves the environmental pollution and secondary pollution caused by animal diseases drug residues and the low digestive absorption efficiency in the breeding process, thus avoiding the risk of animal food safety and the corresponding human health and environmental risks caused by the use of antibiotics The development of a high-tech feed industry with independent intellectual property rights, improving the intrinsic quality of livestock and poultry products and the safety of the ecological environment, is of strategic importance for comprehensively improving the technical level of China's livestock industry and related industries and enhancing competitiveness in the market. This product can be used in feed factories, breeding farms, dairy cow breeding farms, poultry breeding farms, special aquaculture farms, and special pet breeding farms.