Focusing on issues such as microbial contamination in feed, high particle pulverization rate, low granulation efficiency, oil oxidation, and high loss of additives, a compound solution of acidifiers is used to kill bacteria, enhance particle stability, improve granulation efficiency, and automatically add powder to liquid to remove carriers, reduce losses, and increase efficiency. This comprehensively improves feed quality and palatability, adapts to antibiotic free farming, and reduces farming costs.