Compound acidifier for resisting diarrhea and promoting growth of piglets as well as preparation method and application of compound acidifier

The invention discloses a compound acidifier for resisting diarrhea and promoting growth of piglets as well as a preparation method and application of the compound acidifier, and belongs to the technical field of feed additives. Every 100 g of the composite acidifying agent comprises 50-60 g of gallnut tannic acid, 12-15 g of acetic acid, 10-15 g of chlorogenic acid, 7-10 g of lactic acid, 5-7 g of DL-malic acid, 2-3 g of DL-citric acid and 2-3 g of tartaric acid. The compound acidifier can relieve weaning stress of piglets, regulate intestinal microorganisms, remarkably reduce diarrhea of the piglets and promote growth of the piglets, and is also beneficial to improving the feed utilization rate and reducing the feed conversion ratio. The preparation method is simple and easy to operate. When the feed additive is added into piglet daily ration, the feed conversion ratio and diarrhea rate of piglets can be reduced, meanwhile, the number of escherichia coli and campylobacter is reduced, the content of lactobac