Preparation method of low-sugar electronic cigarette liquid

The invention discloses a preparation method of low-sugar electronic cigarette liquid. The method is characterized by comprising the following steps: (1) extracting tobacco leaves or tobacco stems by using a solvent, such as normal hexane, cyclohexane, dichloromethane, petroleum ether, ethyl acetate and dichloroethane or a mixture of the solvents; (2) removing the solvents and the water in extraction liquid to prepare tobacco extract; (3) dissolving the extract by a solvent prepared by mixing ethyl alcohol, propylene glycol and glycerol according to a certain ratio and removing undissolved substance to obtain clear liquid which is the electronic cigarette liquid. The preparation method of the low-sugar electronic cigarette liquid is characterized in that the tobacco is extracted by using a non-polar solvent so as to prepare the low-sugar electronic cigarette liquid; the defect that the electronic cigarette liquid in the prior art is high in content of sugar and is easily converted into harmful carbonyl compounds such as formaldehyde after being heated can be overcome.