1. Illicium verum, Amomum tsaoko and pepper are the main raw materials for cooking pig large intestine. Wash the pig's large intestine with clean water before cooking it. You can turn the large intestine upside down, pick out the oil and dirt inside, and then cook the pig's large intestine in a pressure cooker.

2. If you can't clean it with clear water, you can add some vinegar to the water, rub it a few times, and then rinse it with clear water several times.

3. You can also clean the pig's large intestine with rice washing water, which can clean the pig's large intestine and remove the odor on the pig's large intestine. If you still feel bad smell after washing with rice, you can add some raw powder, cooking wine and salt and rub it a few times until there is no smell.