The invention relates to a making method of dried pitaya peel fruit. The method comprises the following steps of (1), pretreatment of a
raw material: removing the peel of the pitaya, washing the peel by using
distilled water, trimming, and slitting for later use; (2),
sugar soaking: soaking the peel of the pitaya, which is subjected to the pretreatment, into a
sugar alcohol solution, and treating by using an ultrasonic wave; (3), congealing: putting the peel of the pitaya, which is subjected to
sugar soaking treatment, into a refrigerator for freezing until
free water and
bound water in the peel of the pitaya are both congealed; (4), sublimation
drying: putting the peel of the pitaya, which is subjected to congealing treatment, into a vacuum freeze drier, and meanwhile, turning on a
vacuum pump to extract air in the dryer; (5),
desorption drying: putting the peel of the pitaya, which is subjected to the sublimation
drying, into a freeze dryer, and meanwhile, turning on the
vacuum pump, wherein the
moisture of the freeze-dried peel is always maintained to be between 2 percent and 4 percent; further, the peel is subjected to collapse, coking and oxidation; (6), packaging: charging
nitrogen for packaging the freeze-dried peel of the pitaya by using an
aluminum foil-
polyethylene material.