Comprehensive treatment method of aquaculture sewage

The invention relates to a comprehensive treatment method of aquaculture sewage. The comprehensive treatment method includes: allowing the aquaculture sewage generated by an aquaculture pond to pass a grille and then enter a precipitation and filtration tank from the water outlet of a sewage collecting tank through a pipeline; evenly mixing the fermentation liquor of spirulina metabolite, enteromorpha prolifera powder and the like and sweet potato powder according to the mass ratio of (12-15):(2-3):(5-6) to obtain a mixture; adding the mixture into the precipitation and filtration tank, stirring, standing for 2-3 hours, filtering the upper-layer seawater in the precipitation and filtration tank through a filtering screen, and pumping the filtered seawater into the aquaculture pond for aquaculture, wherein the mass ratio of the mixture to the aquaculture sewage is 1:(100-150); allowing sludge precipitated to the bottom of the precipitation and filtration tank to enter sludge drying equipment through a sludge p