The invention provides a perilla flavoring liquid prepared by taking perilla as a
raw material and a preparation method thereof. The perilla flavoring liquid mainly comprises a leaching liquor or a leaching concentrated liquor and a distillate of the perilla, the volume ratio of the leaching liquor or the leaching concentrate to the distillate is 10-20 to 80-90, and the leaching liquor or the leaching concentrated liquor and the distillate are prepared by the following method: broken perilla leaves are taken, and
clean water which accounts for 5 to 8 times of the
mass of the broken perilla leaves and
sodium erythorbate which accounts for 0.01 to 0.1 percent of the
mass of the
clean water are added into the broken perilla leaves,
citric acid is used to adjust the pH value of the mixture to between 2.8 and 4.5, the mixture is leached for 1 to 3 times at a temperature of between 95 and 100 DEG C, the time is between 30 and 120min each time, and volatile compositions are condensed and collected during the leaching to obtain the distillate; leachates produced for many times are merged, and a
chitosan acetic acid solution is added into the leachates to be stirred, clarified, and filtered by a
microfiltration membrane to obtain a clarifying solution, namely the leaching liquor; and the leaching liquor is concentrated to 90 to 10 percent of the prior volume to obtain the leaching concentrate. The perilla flavoring liquid has the advantages of clear and transparent color and luster, no impurities, no layering, natural and pure taste, and
sweetness, and has certain health care function.