The present invention provides a method for preparing frozen dried scallion product. The frozen dried scallion product which has the advantages of fully preserving the delicious component of scallion, small damage degree of product, sanitary insurance without using the sodium hypochlorite solution, and high commodity value can be prepared. The method for preparing the frozen dried scallion product comprises the following steps: a material preparing step, cutting off the useless part of scallion for preparing the rod-shaped scallion, and cleaning the rod-shaped scallion a sterilizing step, boiling or steaming the rod-shaped scallion according to a condition that the temperature of the cleaned rod-shaped scallion is higher than 75 DEG C and the temperature is kept for more than one minute for sterilizing the rod-shaped scallion a freezing step for freezing the sterilized rod-shaped scallion a cutting step for cutting the frozen rod-shaped scallion to a prescribed length and a freeze-drying step for executing freeze-drying to the cut rod-shaped scallion for preparing the frozen dried scallion product.
