First, the control of lyrical conditions so that sows have breeding conditions to the sows more than abreast, produce good Aberdeen, must make the preparation of thin and not fat breeding conditions, too thin, poor nutrition, poor fetal development, piglets post-natal vitality is not strong, Poor quality; too obese, easy to fetal or have fewer litters. The sow breeding sensation maintained at 5?7 became the most appropriate, and the itch during the entire pregnancy remained at 6?8 as the best. Therefore, according to the sow’s body condition, the amount of concentrate feed is increased or decreased so that it has a breeding condition. Second, strengthen the feeding and management, to ensure that the quality of seed breeding quality is directly related to the number and strength of piglets. In order to ensure high yields of multiple sows, sows born after being weaned can receive 200 mg of VE in the sow diet. When the sows are close to the species, they are chopped with half a catty of leeks and fed into the feed each day. A few days before the sow’s estrus, 1000 units of chorionic gonadotropin can also be injected intramuscularly. For sows with poor estrus, the following drugs can be used to aphrodisiac: Angelica 20 grams, 30 grams of Rehmannia, Cistanche, Epimedium each 35 grams, 15 grams of white peony root, 30 grams of Yang Qishi, 40 grams of motherwort, Jianshui seasoning The aphrodisiac effect is particularly good. When mating a sow, it should be done 24 to 48 hours after the sow has started estrus. Within one month after sow mating, more fish meal or bean cake can be fed, and VE80 mg can be added to the diet, which is extremely beneficial to the development of the embryo.