The method comprises the following steps: (1)
raw material pretreatment: taking
tobacco leaf powder after supercritical extraction, putting into a reaction kettle, adding water, uniformly stirring, adjusting the pH value to be 5-6, sealing, reacting for 1-2 hours at the temperature of 180-200 DEG C, cooling, transferring into an
oil bath pan at the temperature of 50 DEG C, and uniformly stirring; (2) compound
enzyme preparation activation and enzymolysis: taking a compound
enzyme (
manganese peroxidase,
laccase and
lignin peroxidase) accounting for 0.5% of the
mass of the
raw material, dissolving the compound
enzyme in water, activating in a water bath at 50 DEG C, dropwise adding the pretreated
raw material, performing
oil bath enzymolysis at 50 DEG C for 3-4 hours, heating to 100 DEG C, stirring for 20 minutes, and cooling to obtain a feed liquid A; and (3) preparing the tobacco absolute, namely centrifuging the feed liquid A, taking supernatant liquid (feed liquid B), adding 95%
ethanol, uniformly stirring, separating and removing impurities by using a
cellulose acetate or
polyacrylonitrile membrane, and collecting permeate liquid to obtain the tobacco absolute. The equipment is simple, the preparation method is green and efficient, and the prepared tobacco absolute can effectively improve the
cigarette smoke quality.