The invention discloses a method for preparing liquorice essence. Raw materials comprise 5,000g of liquorice oil, 3,000g of ylang oil, 3,000g of clove oil, 3,000g of synthetic bergamot oil, 1,000g of vanilline, 50g of benzeneacetic acid dimethylacetal, 20,000g of jasmine absolute, 3,000g of pomelo oil, 3,000g of rose absolute, 1,000g of lemon oil, 3,500g of neroli oil, 3,000g of omega-pentadecanolide, 2,000g of bay oil, 1,500g of coumarin, 500g of muskiness, 3,000g of safflower oil, 300g of mignonette oil, 300g of hyacinth absolute, and 6,000g of benzyl carbinol. The raw materials are accurately weighed according to the proportion in a formula and then are all mixed together, the mixture is placed into a softening body stirring machine for stirring, then is stirred for 30 minutes after all solids are completely dissolved, is taken out and then is placed into a solid box for standing and aging, and the liquorice essence can be obtained through the filtration after 5 days.