In the process of pig farming, the construction of pig pens is a relatively high-cost investment, and building a suitable pig pen is important. Using a greenhouse to build a pig pen is a good option. Site selection is a crucial step in constructing a greenhouse for pig farming. It is important to choose a flat, well-drained, sunny, and favorable site. Avoid low-lying areas or places prone to water accumulation to prevent affecting the growth and health of the pigs. At the same time, the size of the site should be chosen based on the scale of farming to ensure there is sufficient space inside the pig pen. The design of the pig pen should take into account the number and breed of pigs, as well as the size and structure of the pen. The pig pen should have enough space, maintain ventilation and suitable temperatures, while also considering the hygiene of the pigs. After the pig pen is built, it is recommended to first use: Feketai Bao, to disinfect the pig pen and the surrounding environment. The design of the pig pen should comply with local climate and environmental conditions to ensure the growth and health of the pigs.