Breeding method for Laiwu pork pigs under large-scale feeding and management conditions

The invention relates to the field of livestock breeding and particularly discloses a breeding method for Laiwu pork pigs under large-scale feeding and management conditions. The method comprises the steps that a fattening earlier-stage feed and fermented bran are fed when each pig is 30-50 g, wherein the feeding amount is 3.5-4% of the weight of each pig every day, and each time of fermented bran adding amount accounts for 20-40% of the feeding amount; a fattening later-stage feed and fermented bran are fed when each pig is 50-70 g, wherein the feeding amount is 3-3.5% of the weight of each pig every day, and each time of fermented bran adding amount accounts for 15-30% of the feeding amount; a fattening later-stage feed and fermented bran are fed from reaching time of 70 g of each pig to slaughtering, wherein the feeding amount is 2.5-3.0% of the weight of each pork pig every day, and each time of fermented bran adding amount accounts for 30-40% of the feeding amount; three times of feeding are performed at