The invention relates to a health-care konjak rice glue ball and a preparation method thereof. The preparation method comprises the following steps: preparing rice glue ball powder; preparing stuffing; molding the stuffing; quick-freezing; rolling circles of the molded stuffing; packaging; and refrigerating. In the health-care konjak rice glue ball, the konjaku flour is utilized as a main raw material, the konjac glucomannan in the konjaku flour not only is an excellent water-soluble dietary fiber with low calorie, low fat and high cellulose, but also has an important regulating effect in nutritive equilibrium, functions of losing weight, relaxing bowel and regulating cholesterol metabolism, and obvious curative effects on diseases such as arteriosclerosis, gallstone, constipation, diabetes, obesity and the like, thus being a health-care food; lotus rhizome contains various nutritions, is rich in calcium, phosphonium, ferrum and multivitamins and has various functions of reducing fever and moistening the lung, strengthening the spleen and stimulating the appetite, reducing the blood pressure, arresting hemorrhage and the like, thus being a favorable tonic for the old, the young, women, children and weak patients; and sweet potatoes are rich in multivitamins, amino acid and dietary fiber which are essencial to a human body as well as various mineral substances such as calcium, ferrum and the like, are high in amylopectin content and can be easily digested and absorbed by the human body, thus being a health-care food.