It is beneficial for sows to keep the fetus, facilitate the implementation of quantitative feeding, effectively prevent pregnant sows from competing for food and fighting with each other when feeding. The treatment of drinking water and feces in the single stall is very centralized, covers a small area, reduces the amount of sewage production, and facilitates the realization of mechanized management. The outer frame is made of 1-inch international pipe after welding, the whole hot-dip galvanized surface treatment, more corrosion resistant, the column structure is reasonable, the unique way of opening the door makes the operation more simple.