Don't take it out of the pot immediately after cooking. Soak in the pot for two hours. If you want to eat delicious food, cook it in an iron pan for 30 minutes. Soak for two hours. If it is very old skin, boil it more and soak it at last. If you want to make a quick decision, use a pressure cooker, but the taste is not very ideal. How to cook pigskin soft? First, separate the egg white from the yolk of the egg, then soak the pigskin with the egg white for about 10 minute, then fry the pigskin with edible plants until it looks crisp, then add water, preferably to cover the pigskin, and cook it with low fire until it is dry, then the pigskin is soft and elastic.