Individual weaning: weigh the heavier piglets in the nest 2 days to 3 days in advance, so that the smaller piglets have the opportunity to get more breast milk, thus achieving a larger weaning weight. According to the study, those who weigh more than 65 kg at weaning achieved market weight 7 days in advance. One-for-one feeding method: The weaned piglet is transferred from the sow house to the finishing house and raised to the market weight. This reduces the traditional link from the sow house to the nursery house and avoids some of the stress reactions that result from this. The main advantages of this method are faster weight gain and lower labor and transportation costs. The disadvantage is that the utilization rate of the pig house is low and it is not possible to do three batches of pigs per house per year as usual. One-for-one feeding methods also require better insulation performance in the finishing house, and the breeder has a higher level of technology. Weaning Piglet Isolation: The practice is to wean the pigs from 1 to 2 weeks of age and keep the weaned pigs on a nursery farm far from the sow farm in order to reduce the vertical transmission of certain diseases from sows to piglets. Isolation and feeding increases the number of litters per hen per year and the number of litters per year in each farrowing pen, but may reduce the number of litters and litter size in the next litter. Sow-feeding: Sows consume large amounts of nutrients in the body during pregnancy and lactation, mainly fat, protein and minerals. In the first few weeks of lactation, the sow's backfat can be reduced by 30%. In order for the sow to return to estrus, the nutrient reserve must be quickly rebuilt. The sow stage feeding method includes at least 4 types of feed: post-lactation material, pre-match material, post-match material, and post-pregnancy material. Increasing the intake of 300 kcal per day after weaning can increase the number of litters by about one. The added energy must be in the form of starch. This is because glucose produced from starch stimulates ovulation. Organic trace elements are also conducive to recovery of trace element reserves in sows. Environmental Control: The environmental problems caused by pig farming are mainly odors. Measures to control odors include installing expensive sewage treatment facilities, changing the content of protein and minerals in feeds, and adding enzymes and other additives to feeds.