​The principle of boletus edulis mushroom in brine desalination is gradient desalination and gentle treatment. It is necessary to choose the appropriate desalination method according to the amount of ingredients, application scenarios and production scale, and at the same time control important parameters such as water temperature, water volume, and soaking time.

​Except for a few varieties of pickled boletus in drum that are poisonous or bitter and inedible, most varieties are edible. Pickled boletus in drum has a flat and hemispherical cap, smooth, non-stick, light nude color, white flesh, sauce flavor, and can be used as medicine.