The invention discloses a
drying method of flower materials in a peony flower tea preparation technology. The
drying method includes the following steps that fresh peony flowers are picked; outermost petals of the peony flowers are stripped off,
dirt is removed, and the integrity of petals is kept; the treated peony flowers are put into a cryogenic refrigerator in the optimum form to be pre-cooled; the pre-cooled peony flowers are rapidly put into a vacuum freezing dryer, the freezing temperature, the vacuum degree of a
drying chamber, the temperature of a heating plate and the thickness of the material are set, and freezing drying is carried out; the dried peony flowers are stored in a sealed shady place. The dried peony flowers obtained through the drying method hardly shrink, the original color and
flavor are kept basically, and the dried peony flowers have the advantages of being high in phenolic
substance content and high in
oxidation resistance, can serve as a high-quality
raw material of peony flower tea and also have high ornamental value. According to the drying method, on the basis of vacuum freezing drying, the
drying time is short, the process is simple, no
contamination is caused, the product is good in sensory quality, high in
nutrient retention rate and good in rehydration property, and the defects of high time consumption and labor consumption, low efficiency and the like of a traditional drying method are overcome.