Composite plant volatile oil, preparation method thereof and tobacco product

The invention provides compound plant volatile oil. The compound plant volatile oil comprises first plant volatile oil and second plant volatile oil, wherein the first plant volatile oil is obtained by performing supercritical CO2 extraction on the following raw materials in parts by weight: 15-25 parts of radix ophiopogonis, 30-40 parts of dried lily, 25-35 parts of thunberg fritillary bulb and 5-15 parts of radix polygonati officinalis; the second plant volatile oil is prepared from the following raw materials in parts by weight through supercritical CO2 extraction: 35 to 50 parts of fructus momordicae, 20 to 30 parts of radix scutellariae, 5 to 10 parts of fructus cnidii and 15 to 25 parts of semen lepidii. Through synergistic cooperation of the components, the prepared compound plant volatile oil has faint scent, rich fragrance, good lingering property, comfortable taste and no residue. When being added into a hookah material as a functional spice of the hookah, the flavor can be well coordinated with smo