Hirudin functional food and preparation method thereof

The invention relates to the technical field of healthcare food, in particular to hirudin functional food and a preparation method thereof. The preparation method comprises the following steps that leeches are caught into a cleaning net cage, cleaned and placed in an emetic pool for promoting emesis after cleaning is completed, then the emetic leeches are placed in a refrigeration house to be refrigerated, and splitting unfreezing is carried out on the leeches by using a crusher after refrigeration; a biological enzyme is added for fermentation for 6-8 days, after fermentation is completed, hydrolysis is carried out, and the hydrolyzed material liquid is precipitated and filtered; the filtered material liquid is mixed with whole oat powder according to the ratio of 3:7 and uniformly stirred, then a dryer is set to 60-70 DEG C to dry the leeches; an edible grade fruity additive is added into the dried materials to adjust the taste, then magnesium stearate is added, and the mixture is placed into a tablet machi