The invention relates to the technical field of beverage production, in particular to a passion fruit beverage and a preparation method thereof. The passion fruit beverage is prepared from the following components: 20 to 40 parts of passion fruit juice, 5 to 10 parts of Dendrobium officinale juice, 5 to 10 parts of juicy peach juice, 5 to 10 parts of grapefruit juice, 5 to 10 parts of grenadine juice, 5 to 10 parts of citric acid, 1 to 2 parts of a stabilizer and 100 parts of purified water. The passion fruit beverage prepared by the preparation method of the passion fruit beverage disclosed by the invention is formed by taking the passion fruit juice as a main raw material and mixing the Dendrobium officinale juice, the juicy peach juice, the grapefruit juice and the grenadine juice as well as the additives such as the citric acid and the stabilizer with the water, so that the passion fruit beverage is nutrient-rich, good in taste and strong in flavor and has the effects of relieving a cough and moistening the lung as well as clearing heat and removing toxicity; moreover, in cooperation with the various fruits, the health care effects, for passion fruit, of diminishing inflammation and relieving pain, promoting blood circulation and improving the health, reducing lipid and blood pressure, enriching yin and nourishing kidney, refreshing oneself and dispelling the effects of alcohol, removing fatigue, eliminating toxin and beautifying skin, strengthening immunity and the like can be effectively played.