1. Put the loach into a pot, sprinkle a few spoonfuls of salt, and then let it stand for half an hour to wash away the mud and mucus they spit out.

2. After cleaning, you can start killing loach, cut off the fins of loach with scissors, then cut them to the length of about 2 cm in the stomach, dig out the internal organs and black bile inside, and finally wash the blood inside with clear water.