Freeze-dried dendrobium huoshanense and preparation method thereof

The invention discloses freeze-dried dendrobium huoshanense and a preparation method thereof. The freeze-dried dendrobium huoshanense is used for solving the problems that the taste is influenced by high fiber content of dendrobium huoshanense, effective components and nutrient substances cannot be dissolved in water in a traditional brewing mode, and the nutrient components are lost in the drying process. A preparation method of freeze-dried dendrobium huoshanense comprises the following steps: step (1), cutting dendrobium huoshanense into sections, adding water, squeezing juice, filtering to obtain dendrobium huoshanense colloid, adding maltodextrin, stirring and blending, filling into a food-grade mold, and pre-freezing to obtain pre-frozen dendrobium huoshanense; and (2) carrying out stepped multi-stage vacuum-pumping sublimation freeze-drying on the pre-frozen dendrobium huoshanense obtained in the step (1), and drying after freeze-drying to obtain the freeze-dried dendrobium huoshanense. Through stepped