Premix for delaying ovarian function decline of laying hens as well as preparation method and use method of premix

The invention discloses a premix for delaying ovarian function decline of laying hens as well as a preparation method and a use method of the premix. The premix is prepared from the following components: theabrownin, daidzein, genistein, folium mori flavone, folium mori polyphenol, folium mori alkaloid, vitamin E, manganese methionine, resveratrol and rice chaff. The using method comprises the following steps: (1) preparing a premix; (2) preparing corn, soybean meal, soybean oil, calcium carbonate, corn germ meal, calcium hydrophosphate, wheat bran, sodium chloride, choline chloride, L-lysine hydrochloride, DL-methionine, threonine, tryptophan, sodium bicarbonate, compound multivitamins, a mineral premix and a premix; and (3) crushing the corn and the soybean meal, and uniformly mixing the crushed corn and soybean meal with other components to prepare the feed for delaying ovarian function decline of laying hens. The premix and the feed provided by the invention can improve the antioxidant function and hormon