The invention specifically relates to a preparation method for nicandra physalodes, belonging to the field of food. The preparation method comprises the following specific implementation steps: firstly,
processing of a nicandra physalodes
colloid solution: a step of taking nicandra physalodes seeds, carrying out extracting, carrying out stirring at a
low speed, carrying out pumping and discharging, carrying out
temporary storage in a
jar, carrying out pumping and discharging, and carrying out separating; secondly, extracting of the nicandra physalodes
colloid solution, namely addition of an
antioxidant into the nicandra physalodes
colloid solution, and
cryopreservation with
liquid nitrogen: a step of temporarily storing the nicandra physalodes colloid solution in the
jar, adding quaternaryammonium salt, carrying out pumping, carrying out filtering with a filter, clarifying the colloid and carrying out
temporary storage in the
jar, carrying out packaging, performing ultra-high-pressuresterilization, and performing
cryopreservation; and finally, preparation of the nicandra physalodes: a step of taking a solidified nicandra physalodes colloid solution, carrying out unfreezing and diluting, adding a
calcium liquid, carrying out stirring, repeatedly carrying out pouring, and stopping pouring a gel so as to obtain glittering and translucent edible nicandra physalodes full of bubbles. According to the invention, after ultrahigh-pressure sterilization, by cooperation of the bacteriostasis and sterilization effects of the
quaternary ammonium salt, the
shelf life of the nicandra physalodes is remarkably prolonged, and the production cost of the nicandra physalodes is reduced.