The invention discloses a preparation method and application of a
litter leach liquor adding culture medium of soil microorganisms. The preparation method is characterized in that a typical
litter under a
plant biotope where investigated soil is positioned is selected, about 1kg of multi-point mixing samples of an un-decomposed layer under the
surface layer of the
litter is directly collected andis packaged in a
plastic bag to be taken back to a laboratory, a pair of scissors is adopted to
cut the litter into pieces, the litter and
distilled water are mixed in a triangular flask according toa
mass ratio of 1:15, after a mixture is vibrated by a table
concentrator for 30min, standing is carried out for 10min, the obtained mixture is filtered by gauze, and filtrate is litter leach liquor.Under a situation that the rest medicines in a formula of a bacterium,
fungus and actinomycetes culture medium in the existing soil microorganisms are constant, the litter leach liquor is used for replacing 10% of a use amount of
distilled water, and after high-temperature sterilization is carried out, the culture medium is obtained. The preparation method disclosed by the invention has a low cost, can be conveniently manufactured, can obviously improve the diversity of culturable microorganisms, and provides
technical support for isolated culture and subsequent relevant research of the soil-culturable microorganisms.