1. Put Sophora japonica into a bowl or basin, and then stick it with plastic wrap. Finally, punch 10 holes in the plastic wrap with a toothpick to keep the humidity.

2. With a compressor, put the Sophora japonica flowers in a vacuum bag, exhaust the air in the bag with a compressor, and then put it into the mixture of salt water. This method is suitable for families without refrigerators.

3, you can boil the acacia flower for about 5 minutes, then drain and control the water, and finally expose it to the sun for a day or two, and finally become a dried acacia flower, which will taste good.

4. Pickled with salt or sugar can also be preserved for a longer time, and the taste is quite good.

5. The acacia flowers are air-dried and all the water is blown out under the fan.