1. Preservation of fresh bitter melon: wrap it in paper or plastic wrap and store it in the refrigerator.

2. Quick-frozen storage of blanched bitter melon: wash, remove seeds and pulp, slice into slices, immerse in boiling water and blanch for 0.5 to 1 minute, while stirring constantly. Take it out and quickly immerse it in cold water to cool down, so that the melon temperature drops to 5-8℃ in a short time. Remove and drain the water, then quickly freeze in the refrigerator. The optimal temperature of the vegetable body is -18°C. It should be turned 2 to 3 times during the quick freezing process to promote the formation of ice crystals and prevent the vegetables from freezing into lumps. Take out the quick-frozen bitter melon, put it into a food bag, seal it, and store it in the freezer of the refrigerator. It can be stored for half a year.