The invention discloses a cassia bark and ginger health-care beverage and a preparation method thereof, belonging to the technical field of beverages. The cassia bark and ginger health-care beverage uses gingers, cassia barks, red dates, brown sugar, citric acid, vitamin C, a stabilizing agent and purified water as main raw materials and is prepared by the steps of dissolving, filtering, mixing, homogenizing, sterilizing, tinning, and the like. The cassia bark and ginger health-care beverage is rich in nutrient components of the gingers, the dates, the brown sugar, the cassia barks, and the like and has the effects of warming channels, expelling cold, strengthening the spleen and nourishing body weakness as well as the effects of stopping pains, stopping swellings, and the like on the digestive system. The health-care beverage not only has the fragrance of the brown sugar, but also has the sweet and sour taste of flavoring agents, overcomes the hot taste of the gingers and has good taste. The cassia bark contained in the health-care beverage can effectively control the sugar balance, thus the health-care beverage is suitable for both old people and young people, and the vitamin C contained in the health-care beverage can improve the absorption and the utilization of the nutrient components, which is more beneficial to health.