Preparation method of freeze-dried specimen of shrimp and crab aquatic animals

The invention provides a preparation method of a freeze-dried specimen of shrimp and crab aquatic animals. The method comprises the following steps: selecting shrimp and crab samples with complete body structures; cleaning the shrimp and crab samples; carrying out alcohol immersion lethal treatment on the samples, wherein alcohol can also preliminarily absorb moisture in the sample for facilitating later-stage recording and photographing; observing the configuration of the samples, recording colors, conducting photographing recording on the samples for facilitating contrast with later-stage finished products; placing preprocessed shrimp and crab samples in a freeze-drying box, freezing the samples, placing the samples in a frozen state at a vacuum degree which is about 1/2-1/4 of a saturated vapor pressure at a corresponding temperature, controlling the water vapor partial pressure to be lower than the three-phase-point pressure of water, controlling the heating temperature to guarantee constant-speed sublima