The invention belongs to the technical field of dairy product processing, and provides probiotic fermented yoghurt cover tea and a preparation method thereof. The probiotic fermented yoghurt cover teacomprises a yoghurt cover and tea soup, wherein the yoghurt cover comprises the following components in percentage by weight: 60%-85% of fresh milk, 6%-9% of sucrose, 6%-9% of single cream, 0.5%-2.0%of whey protein concentrate, 0.5%-2.5% of whole milk protein powder, 0.1%-2.0% of cheese powder, 0.15%-0.25% of edible salt, 0.5%-1.5% of a compound thickening agent, 0.003%-0.005% of probiotic fermentation agent, 0.0002%-0.001% of cheese essence, and the balance of deionized water, and the total percentage by weight of the components is 100%, and the tea soup comprises the following components in percentage by weight: 0.5%-5.0% of tea leaves, 3.0%-7.0% of high fructose corn syrup and the balance of deionized water, and the total percentage by weight of the components is 100%. Through the technical scheme, the problem that in the prior art, a milk cover in milk cover tea is difficult to suspend at the top of tea soup for a long time is solved.