The invention discloses a compound 
microorganism liquid bacterial 
fertilizer for preventing 
plant diseases and 
insect pests and a preparation method of the compound 
microorganism liquid bacterial 
fertilizer and belongs to the technical field of microorganisms. The bacterial 
fertilizer comprises raw materials of, by weight, 10-20 parts of paprika powders, 10-20 parts of chilli powders, 5-15 parts of 
ginkgo leaf powders, 5-15 parts of chinaberry powders, 5-15 parts of lightyellow 
sophora root powders, 20-40 parts of mashed garlic, 40-80 parts of molasses, 4-8 parts of 
soybean meal, 5-15 parts of 
calcium sulfate, 5-15 parts of 
magnesium chloride, 5-10 parts of salt, 5-15 parts of 
photosynthetic bacterium strains, 5-15 parts of saccharomycete strains, 5-15 parts of 
lactic acid bacterium strains, 5-15 parts of 
streptomyces jingyangensis strains, 5-15 parts of 
bacillus subtilis strains and 800 parts of water. According to the compound 
microorganism liquid bacterial fertilizer, 
probiotic floras which are screened and are capable of coexisting are used for fermenting 
plant leaching agents of pepper, chilli, 
ginkgo leaves, chinaberry, lightyellow 
sophora roots and garlic, the 
plant leaching agents are capable of expelling and killing the 
insect pests and harmful 
bacteria, the compound microorganism liquid bacterial fertilizer has the advantages of being high in content of live 
bacteria of probiotics, high in activities, high in stability, small in using amount of plant materials, fast in acting effects, non-toxic and environment-friendly, and has wide application prospects in agricultural planting.