1. Improve sow oestrus breeding rate and litter size. When pig feed lacks vitamin E, it is easy to have abortion and stillbirth, slow growth, leukodystrophy, reduced survival rate, etc. It can also lead to poor quality of fattening pig meat. 2. Enhance the reproduction and egg-laying ability of laying hens, and also promote the formation of spermatozoa of breeder roosters and enhance their vitality, improve the fertilisation rate of egg breeders. If the ducks and geese feed lack of vitamin E will make the body oxidative dysfunction, there will be cerebral softening, leukodystrophy, male ducks and geese testicular shrinkage, azoospermia, egg fertilization rate reduction and other problems.