The invention discloses a donkey-hide gelatin preparation and a preparation method thereof. The components of raw materials comprise donkey hides, rock sugar, bean oil, tea oil, yellow wine and the like; and the preparation method comprises the process steps of hide soaking, hide washing, hide scalding, hide melting, filtration, gelatin juice separation, evaporation, impurity extraction, concentration and gelatin forming, vacuum microwave drying, crushing, preparation, treatment on defective products of the donkey-hide gelatin preparation and the like. The donkey-hide gelatin preparation not only technically improves the prior art naturally, avoids pollutions, improves the product quality and the yield, shortens the production period and reduces the energy consumption and the labor hour, but also is added with the tea oil in the formulation to improve the health care attribute of the donkey-hide gelatin preparation and have a better taste.