1, stew bone soup in a pressure cooker. Generally, it's almost enough to wait until SAIC switches to medium and small fire for 30 minutes. Stew with high fire until the water boils, and then switch to low fire. The pressure cooker should not be used for a long time, otherwise the nutrients in the bones are not easy to precipitate.

2, a pig bone, cut into small pieces, half a fresh yam (also known as yam), a corn, a carrot, peeled and cut into large pieces, a large piece of ginger, a little salt and pepper.

3. Wash the pig bones, put them in a large pot of cold water for five minutes, and then rinse them carefully with cold water.

4. Put pork bones and ginger into a pressure cooker, add eight bowls of cold water to boil, and then turn to low heat to let the water boil, not boil. Be sure to put enough water at a time, without adding water in the middle.

5. Add corn and carrots after one hour, continue to cook for one hour, add yam for another hour, put salt and turn off the fire. Simmer for a long time, the bones will be crisp and the meat will be rotten, and the soup will be more delicious.