Abstract: In a large-scale piggery with microbial fermentation bed, 1500 pigs could be raised at the same time, which was so large that the management was very difficult.The pig population varies at body size, health condition, disease resistance, competition ability, and it is difficult to observe the pig behaviors of feeding, drinking, moving, sleeping, fighting, etc, which results in lack of pig population management for weak and ill ones.Barrier structure design for large-scale piggery with microbial fermentation bed was used for pig population management, and the pigs were gradually fed separately.The microorganism fermentation bed swine piggery was divided into eight big bar areas, 4barriers located in both sides of the microorganism fermentation bed were for the sick, weak, small and inferior pigs.The body field was divided into 4parts to gradually isolate different sizes of finishing pigs.With the design, the management ways for pigs at different growth stage varied by the barriers, which classified the healthy pigs from the sick ones, and made them fed separately.When the finishing pigs reached 75 kg, and kept healthy stably, all bar doors could be open for pigs to move freely in a larger area.The barrier design was proved to have advantages in treatment of sick pigs, rehabilitation of weak pigs and management of the pigs at the same period in the large-scale piggery of microbial fermentation bed.