Preparation method of freeze-dried stinky tofu and freeze-dried stinky tofu

The invention belongs to the technical field of freeze-dried stinky tofu, and relates to a preparation method of freeze-dried stinky tofu and freeze-dried stinky tofu, the preparation method of freeze-dried stinky tofu comprises the following preparation steps: S101, selecting a tofu blank with the water content of 80%; s102, performing fermentation treatment on the bean curd blank in the step S101 to obtain the stinky bean curd; s103, performing pre-freezing treatment on the stinky tofu obtained in the step S102 in a freezer; s104, the freeze dryer is pre-cooled in advance, the cold hydrazine temperature is-40 DEG C or below, and then the stinky tofu pre-frozen in the step S103 is put into a drying bin of the freeze dryer; the first-stage drying comprises the following steps: 1) controlling the vacuum degree in the drying bin to be less than 20pa, raising the temperature to 70 DEG C, and drying for 3 hours; (2) the vacuum degree in the drying bin is controlled to be 20-40 pa, the temperature is 70 DEG C, and