Olive beverage and preparation method thereof

The invention provides an olive beverage and a preparation method thereof, and belongs to the technical field of beverages. The olive beverage is prepared from the following raw materials: olive juice, mandarin orange juice, black tea soup, cane sugar, honey, microcrystalline chitosan, polyphenol oxidase, vitamin C, sodium carboxymethyl cellulose, an emulsifier and a stabilizer. The dosage ratio of the microcrystalline chitosan to the polyphenol oxidase to the vitamin C is (1-3): (0.8-2.4): (3-4). The microcrystal chitosan, the polyphenol oxidase and the vitamin C are added to achieve a synergistic effect, an amino group of the microcrystal chitosan is combined with an active center of the polyphenol oxidase, and the microcrystal chitosan has a scavenging effect on oxygen free radicals; the polyphenol oxidase promotes the tea polyphenol substances to be subjected to oxidative polymerization reaction under the catalysis of the polyphenol oxidase; vitamin C can be complexed with polyphenol oxidase prothetic gro