Before cleaning, turn the large intestine upside down and pick up all the oil and dirt inside. Then 1, when cleaning the pig's large intestine, add some vinegar and a tablespoon of alum to the water, rub it for several times, and then rinse it with clear water for several times to make it clean. 2, buy pig intestines and other water, add some salt and alkali before cleaning, which can reduce its odor. 3. Washing pig intestines and pig bellies with rice washing water is also very effective. 4. Wash the pig intestines with sauerkraut only twice, and the fishy smell can be basically eliminated. 5。 Your own secret recipe can be washed with flour and vinegar several times. Wash pork bellies skillfully Many people like to eat pork bellies, but it is not easy to clean them. Most people use salt to scrub the pig's belly, but the effect is not particularly good. If some vinegar is used in the cleaning process, the effect will be better. Because through the action of salt vinegar, part of the dirty smell in the belly can be removed, and the mucus in the epidermis can also be removed. This is because vinegar makes collagen change color and condense; Salt has a high osmotic pressure. Through the action of salt and vinegar, collagen can be separated from the belly wall, so as to remove dirt and smell. After cleaning, the belly should be put in cold water and the calluses at the tip of the belly should be scraped off with a knife. It must be noted that alkali can't be used when washing the belly, because alkali has strong corrosiveness. Under the action of clothing, the mucus on the belly surface will fall off and the protein on the belly wall will be destroyed, reducing the nutritional components of the belly.