1. Salt and flour (starch can also be used): After washing the pig's large intestine with clear water to remove mucus, sprinkle salt and flour outside the intestine, rub it repeatedly, rinse it with clear water, scoop it up after boiling water, and scrape off dirt.

2. cooking wine. Put the large intestine treated in the first step into a container, pour cooking wine, rub it repeatedly inside and outside, and then rinse it with water.

3. Taomi water. Cleaning the treated large intestine in rice washing water can better remove the odor.