Fermented earthworm powder and preparation method thereof

The invention provides fermented earthworm powder and a preparation method thereof. The preparation method comprises the following steps that earthworms are ground for 100-140 minutes, the grinding temperature is gradually increased to 78-80 DEG C from 60-62 DEG C, water is added in the grinding process, and earthworm grinding liquid is obtained after grinding is completed; a mixing agent is added into the earthworm grinding liquid and fermented at 78-82 DEG C, the mixing agent comprises, by mass, 66-70% of staphylococcus carnosus and 30-34% of neutral protease, and earthworm fermentation liquid is obtained after fermentation and enzymolysis; phosphate is added into the earthworm fermentation liquor to adjust the pH value to 4.5-6.5, and the stability of the earthworm fermentation liquor is maintained; and the earthworm fermentation liquor added with the phosphate is dried to prepare powder, thereby obtaining the fermented earthworm powder. Through proper grinding temperature and grinding time, protein is sta