The invention relates to a preparation method of a mold
spore product. The preparation method comprises the following steps: inoculating molds onto a
solid culture medium containing millet and
bran; eluting
mold spores from the
solid culture medium by using an
elution solution after the molds are grown fully on the surface of the
solid culture medium, so as to obtain a
spore elution solution; filtering and centrifugally washing the
spore elution solution to obtain a spore precipitate; then
processing the spore precipitate into the mold spore product. By using the
bran and the millet as the culture medium, the sporulation quantity is greatly increased, and the maturation time of the spores is shortened. In addition, compared with a conventional spore suspension product, the spore
powder product has the advantages that the storage time is greatly extended, and the spore suspension concentration is basically not changed after re-
dissolution. Storage and transportation are carried out in a form of the spore
powder product, so that great convenience is provided, and spattering and leakage of the spore suspension during storage and transportation can be effectively avoided.