1. Sun-dried preservation: Wash fresh Sophora japonica with clear water, and then blanch it with hot water. The scalded Sophora japonica needs to be squeezed out of water, then spread on a bamboo cover and exposed to the sun for 2-3 days.

2. Short-term storage: Fresh Sophora japonica can be stored for one week without washing, directly packed in plastic bags, tied tightly and put in the freezer. If you don't put it in the refrigerator, you can put it in a basket, cover it with a wet cloth, put it on a cool ground, or store it for a few days.

3, sealed frozen storage: put it in a plastic bag, preferably a sealed bag, and pump up the air inside, if there is an air pump or vacuum cleaner, it is best. Then seal it and put it in the refrigerator for freezing. Even if it is left for a long time, it looks like it has just been picked.

4. Store in a ventilated and dry place: If you don't plan to freeze Sophora japonica, you must store it in a ventilated and dry place away from the sun, such as a cellar and storage room, and pay attention to the fact that Sophora japonica can't get wet during storage, otherwise the wet Sophora japonica will go bad.