Compound microorganism preparation capable of degrading aquaculture pollution and preparation method thereof

The invention relates to a preparation method of a compound microorganism preparation capable of degrading aquaculture pollution and further relates to the compound microorganism preparation prepared through the preparation method. The method comprises the following steps that photosynthetic bacteria, alkali-producing bacteria, bacillus subtillis and aspergillus oryzae are mixed to be uniform according to the bacterial count proportion being (8-9):(3-4):(3-4):(2-3), and mixed bacteria are obtained; a medium solid substance, a sea mud leaching solution, rice bran and other fermentation solutions and the mixed bacteria are mixed according to the weight ratio being (5-6):1:1:(60-65) and fermented inside a fermentation tank to obtain mixed fermentation bacterium liquid; Amphora coffeaeformis and Alexandrium tamarense are mixed to be uniform according to the mass ratio being 3:1 to obtain mixed algae powder; auxiliary material fillers, mixed algae powder, bentonite and mixed fermentation bacteria are mixed accordi