The invention relates to a preparation method of a liquorice, flower and green tea solid drink. Main raw materials include liquorice, chrysanthemum, honeysuckle flowers and green tea, the ratio of the liquorice, the chrysanthemum, the honeysuckle flowers and the green tea is (10-40): (2-10): (1-6): (2-10), main food additives comprise, by weight, 3.3 parts of citric acid, 8.25 parts of L-malic acid, 6.6 parts of sodium citrate, 40-80 parts of xylitol, 40-80 parts of sorbitol, 3-5 parts of stevioside, 1.5 parts of sodium erythorbate, 0-80 parts of honey, 0-80 parts of glucose, 0-300 parts of high fructose corn syrup, 0-200 parts of maltodextrin, 0-200 parts of water-soluble dietary fiber and 20 parts of sodium hexametaphosphate. The preparation method includes subjecting the liquorice, the chrysanthemum, the honeysuckle flowers and the green tea to decocting, immersing, filter liquid extracting, dispensing, filtering and spray drying to prepare powders or granules. The liquorice, flower and green tea solid drink has the advantages of being good in taste, nutrient and healthy in ingredients, free of crane sugar, obvious in heat clearing and toxicity removing effects, capable of functioning heath care, small in size, convenient to carry and the like.