The invention discloses a method for fermenting
food industry leftovers by using a
fermentation agent containing
bacillus velezensis, which comprises the following steps: (1) inoculating
bacillus velezensis XDY021 bacterial liquid into a sterilized culture medium, carrying out shake-flask culture, and then transferring into a seed tank for culture to obtain the
fermentation agent containing
bacillus velezensis; (2) taking a
fermentation substrate composed of
protein-containing leftovers and
sugar-containing leftovers, adding water, and
grinding into
slurry; and (3) putting the pasty fermentation substrate into a fermentation tank, adjusting the pH value, adding a fermentation agent containing bacillus velezensis, and fermenting for 24-120 hours, thereby obtaining the product. According to the method disclosed by the invention, the
protein-containing leftovers and the
sugar-containing leftovers are fermented by the fermentation agent containing bacillus velezensis, the particle size, the
water insoluble content and the like of the obtained fermentation material just meet the requirements for culturing the spider, and the fermentation material is beneficial to
ingestion of the spider and is particularly suitable for being used as a bait for culturing the spider. In addition, the bacillus velezensis XDY021 still exists, so that the bacillus velezensis XDY021 is resistant to storage, other infectious microbes cannot be bred in the storage process, and the phenomena of
flatulence, expansion and the like cannot occur.