The invention discloses a preparation method of a composite
microbial agent for kitchen waste composting. The preparation method comprises the following steps: S1, pretreating a
solid matrix; S2, extracting multiple decomposing
bacteria capable of decomposing kitchen waste from a kitchen waste sample, and culturing the multiple decomposing
bacteria; and S3, mixing the pretreated
solid matrix withthe multiple decomposing
bacteria cultured in the step S2, and further culturing and air-
drying to obtain an air-dried product, namely the
solid composite
microbial agent. According to the invention,after kitchen waste is collected and transported in a centralized manner, the prepared composite
microbial agent can be put into the kitchen waste, so that the kitchen waste is fully fermented and decomposed to finally prepare
compost. The prepared composite microbial agent optimizes
decomposition ability of each degrading bacteria, can induce composting of kitchen waste as quickly as possible, comprehensively considers a role of indigenous microbial populations and exogenous bacterial species in composting, reduce
adaptation time of bacterial strains, and shorten composting cycle.